Answers
MCQs as follows-
A common characteristic of living organism is show locomotionthe heat is a type of energyglacier is not considered as a method of precipitationthe process of producing energy in organism is nutritionsea anemone is a locomotive animal is an incorrect statementplan shows limited growth is an incorrect statementhawk is an organism who lives in aerial envionmentglass is a material who does not have ductilitysodium chloride is the main salt that dissolves in marine waterchlorophyll is the light-absorbing green coloured pigment that begins the process of photosynthesis, and Chloroplast is a membrane-bound organelle in green plant and algal cells that carries out photosynthesis and generates ATP for the use of plants.
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Related Questions
the basic model used in assessing the toxicity of a chemical includes its routes of
Answers
Toxicology is a complex and evolving discipline. The basic model used in assessing the toxicity of a chemical includes its route(s) of entry into the body and the dose or concentration of the chemical.
Toxicology is the scientific discipline that studies the adverse effects of chemicals or physical agents on living organisms. It aims to understand the mechanisms of toxicity, assess the risks associated with exposure to these agents, and establish safety guidelines for their use.
The two crucial factors: the route(s) of entry into the body and the dose or concentration of the chemical.
1. Route(s) of Entry:
Chemicals can enter the body through various routes, including:
a) Inhalation: Chemicals can be inhaled into the respiratory system, where they can be absorbed through the lungs and enter the bloodstream.
b) Ingestion: Chemicals can be ingested by mouth, either through contaminated food, water, or direct ingestion of substances. They pass through the digestive system, where absorption occurs in the gastrointestinal tract.
c) Dermal Absorption: Chemicals can be absorbed through the skin when they come into contact with it. This route is relevant for certain liquids, solids, or gases that can penetrate the skin barrier.
d) Injection: Chemicals can be introduced directly into the body through injections, such as intravenous, intramuscular, or subcutaneous administration. This route bypasses natural barriers and allows chemicals to rapidly enter the bloodstream.
2. Dose or Concentration:
The dose or concentration of a chemical refers to the amount of the substance that enters the body over a specific period. It is typically expressed as milligrams of the chemical per kilogram of body weight (mg/kg) or as a concentration in the surrounding environment.
The dose-response relationship is a fundamental principle in toxicology. It describes the relationship between the dose of a substance and the biological response it elicits. Generally, as the dose increases, the magnitude or severity of the response also increases. However, toxicological responses can be complex, and certain substances may exhibit non-linear or threshold effects, where a response is only observed above a certain threshold dose.
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The complete question is:
Toxicology is a complex and evolving discipline. The basic model used in assessing the toxicity of a chemical includes its route(s) of entry into the body and
1. To check acidic or basic character of t h e substance
andneutralization
Material Required: Amla, Tamarind, orange, ENO, soap,
window cleaner, china rose as an indicator. Procedure:
1. Take out Amla, tamarind, and orange and check
theircolour in the china rose solution. 2. What are the colour changes of these things?
3. Record your observation. Take out the rest of the
things and check their colour change also in the china
rose solution (indicator). Now mix the solution of any two i. E. One acid and one base
in equal amounts and check the colour of this solution in
china rose solution. Record your observations
Answers
The experiment involves observing the color changes of various substances in the presence of a china rose indicator to determine their acidic or basic nature. The neutralization process can also be observed by mixing an acid and a base and noting the resulting color change.
In this experiment, the aim is to determine the acidic or basic nature of different substances and to observe the neutralization process. The materials required include amla, tamarind, orange, ENO (an antacid), soap, window cleaner, and china rose as an indicator. The procedure is as follows:Take amla, tamarind, and orange and observe their colors in the china rose solution (indicator).Note any color changes that occur in the substances when placed in the china rose solution.Record your observations.Next, take the remaining substances (ENO, soap, window cleaner) and observe their color changes when placed in the china rose solution.Record your observations.To observe neutralization, mix equal amounts of the solution of an acid (e.g., orange juice) and a base (e.g., ENO) and check the color of this solution in the china rose solution (indicator).Record your observations.By observing the color changes in the china rose solution, you can determine whether a substance is acidic, basic, or neutral. Acidic substances will exhibit a different color change compared to basic substances. The color change in the neutralization mixture may indicate a shift towards neutrality.For more questions on neutralization
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Which of the choices is an example of an element?
O CO
O Co
O C2H2O2
O CO2
Answers
Answer:
Co(cobalt) is the answer
Explanation:
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
classify nacl as a neutral, acidic, or basic salt.
Answers
NaCl is an example of a neutral salt.
Why is NaCl a neutral salt?
Sodium chloride (NaCl) is a neutral salt because it is composed of both a cation (Na+) and an anion (Cl-) that have equal and opposite charges. The positive charge of the sodium ion (Na+) is exactly balanced by the negative charge of the chloride ion (Cl-), resulting in a neutral compound.
When NaCl dissolves in water, the water molecules surround the ions and separate them from each other. The positively charged sodium ions (Na+) are attracted to the negatively charged oxygen atoms in water molecules, and the negatively charged chloride ions (Cl-) are attracted to the positively charged hydrogen atoms in water molecules. This process is called hydration or solvation.
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Silver tarnishes in presence of hydrogen sulphide and oxygen because of the reaction 4Ag + 2 H2S + O2 → 2 Ag2S + 2 H2O How much Ag2S is obtained from a mixture of 0. 950 g Ag, 0. 140 g of H2S and 0. 08000 g O2
Answers
According to the question the mass of Ag₂S produced is 0.063 g.
What is mass?Mass is a measure of the amount of matter an object contains. It is usually measured in kilograms and grams, and is an important concept in physics and chemistry. Mass is related to other properties such as weight, density, and momentum. Mass can be determined either by measuring the object's weight in a gravitational field or by measuring its inertia, which is its resistance to acceleration caused by a force.
The amount of Ag₂S produced can be calculated using the molar ratio of the reactants and products in the equation: 4Ag + 2 H₂S + O2 → 2 Ag₂S + 2 H₂O
First, calculate the amount of each reactant in moles:
Ag: 0.950 g / 107.87 g/mol = 0.00877 mol
H₂S: 0.140 g / 34.08 g/mol = 0.0041 mol
O2: 0.08000 g / 32.00 g/mol = 0.0025 mol
Then, use the molar ratio to calculate the amount of Ag2S produced:
2 Ag₂S = 0.00877 mol x (2 mol Ag₂S/4 mol Ag) = 0.0044 mol
Therefore, the mass of Ag₂S produced is 0.0044 mol x 143.7 g/mol = 0.063 g.
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The mass of \(Ag_2S\) obtained from the given mixture is 1.015 g.
The given chemical equation shows that 4 moles of Ag react with 2 moles of \(H_2S\) and 1 mole of \(O_2\) to form 2 moles of \(Ag_2S\) and 2 moles of \(H_2O\).
To determine the mass of \(Ag_2S\) produced, we need to find out the limiting reactant first. The limiting reactant is the reactant that is completely consumed during the reaction and limits the amount of product that can be formed.
We can find the limiting reactant by calculating the amount of product that can be formed from each reactant.
For Ag:
The molar mass of Ag is 107.87 g/mol. The number of moles of Ag present is:
0.950 g / 107.87 g/mol = 0.00880 mol
The amount of \(Ag_2S\) that can be formed from 0.00880 mol of Ag is:
0.00880 mol Ag x (2 mol \(Ag_2S\) / 4 mol Ag) = 0.00440 mol \(Ag_2S\)
For \(H_2S\):
The molar mass of \(H_2S\) is 34.08 g/mol. The number of moles of \(H_2S\) present is:
0.140 g / 34.08 g/mol = 0.00410 mol
The amount of \(Ag_2S\) that can be formed from 0.00410 mol of \(H_2S\) is:
0.00410 mol \(H_2S\) x (2 mol \(Ag_2S\) / 2 mol \(H_2S\)) = 0.00410 mol \(Ag_2S\)
For \(O_2\):
The molar mass of \(O_2\) is 32.00 g/mol. The number of moles of \(O_2\) present is:
0.08000 g / 32.00 g/mol = 0.00250 mol
The amount of \(Ag_2S\) that can be formed from 0.00250 mol of \(O_2\) is:
0.00250 mol \(O_2\) x (2 mol \(Ag_2S\) / 1 mol O2) = 0.00500 mol \(Ag_2S\)
From the above calculations, we can see that the amount of \(Ag_2S\) that can be formed from Ag is 0.00440 mol, from \(H_2S\) is 0.00410 mol, and from \(O_2\) is 0.00500 mol.
Since the smallest amount of \(Ag_2S\) that can be formed is from \(H_2S\), it is the limiting reactant. Therefore, the amount of \(Ag_2S\) that can be formed is 0.00410 mol.
The molar mass of \(Ag_2S\) is 247.80 g/mol. Therefore, the mass of \(Ag_2S\) that can be formed is:
0.00410 mol \(Ag_2S\) x 247.80 g/mol = 1.015 g \(Ag_2S\) (rounded to three significant figures)
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Complete question:
What is the mass of Ag2S obtained from a mixture of 0.950 g Ag, 0.140 g of H2S, and 0.08000 g O2, according to the reaction 4Ag + 2H2S + O2 → 2Ag2S + 2H2O?
You have 1,000 cubic meters of water and are trying to find a container large enough to hold it. Which of the following scale models would indicate that the container the model represents would hold all of your water, if in each model the scale is 1 inch = 1 meter?
Answers
The scale model that would indicate a container large enough to hold 1,000 cubic meters of water if the scale is 1 inch = 1 meter is a model that has a volume of 1,000 cubic inches.
To determine this, we first need to convert cubic meters to cubic inches, as the scale for each model is given in inches.
1 meter = 39.37 inches,
so 1 cubic meter = (39.37 inches)³ = 61,023.7 cubic inches.
Therefore,
1,000 cubic meters = 1,000 x 61,023.7 = 61,023,700 cubic inches
Since the scale is 1 inch = 1 meter, we can use the volume formula for a rectangular prism, which is length x width x height, to determine the volume of the container represented by each model.
For example, if a model has dimensions 10 inches x 10 inches x 10 inches, its volume would be 10 x 10 x 10 = 1,000 cubic inches. We would then need a container that has 61,023,700 / 1,000 = 61,023.7 of these models, or one model that has a volume of 61,023,700 cubic inches.
As a result, if the scale is 1 inch = 1 metre, the scale model that would suggest a container large enough to store 1,000 cubic metres of water has a volume of 61,023,700 cubic inches.
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Scenario
Lily had three children. Two of her children has blonde hair and one has dark hair. All of her children share the same father. Blonde hair is recessive (b) to dark hair (B) which is dominant
Prompt
What genotype in the mother and father could produce this outcome in the phenotypes of their
offspring? Write a scientific explanation that explains the genotype for Lily and her husband.
Claim: what is the genotype of mom and dad?
Evidence:
Reasoning
Answers
Claim: The genotype of the mother (Lily) is Bb, and the genotype of the father is BB.
Evidence:
1. Two of Lily's children have blonde hair, which is a recessive trait. This indicates that Lily carries the recessive allele for blonde hair (b).
2. Dark hair is the dominant trait, and Lily's husband is the biological father of all three children. Therefore, the father must carry at least one dominant allele (B) for dark hair.
3. All of Lily's children share the same father, so the father must have passed on the dominant allele for dark hair to each child.
4. Since Lily and her husband have three children, and two of them have blonde hair (recessive phenotype), it is likely that Lily is heterozygous for the hair color gene (Bb), while her husband is homozygous dominant (BB).
Reasoning:
Inherited traits are determined by alleles, or alternative forms of a gene. In this case, the gene for hair color has two alleles: B (dominant for dark hair) and b (recessive for blonde hair). The presence of blonde-haired children indicates that Lily carries the recessive allele (b) for hair color, as blonde hair is a recessive trait. Since all of Lily's children share the same father and two of them have blonde hair, it suggests that the father must have passed on the dominant allele (B) for dark hair to each child. This indicates that Lily's husband is homozygous dominant (BB) for the hair color gene. Therefore, the genotype of Lily is Bb, and the genotype of her husband is BB.
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The ph scale ranges from ____________ at its lowest to ____________ at its highest and measures the alkalinity of a solution.
Answers
Answer:
The pH scale ranges from 0-14.
Explanation:
Zero is the most acidic measurement while six would be the least acidic of the acids, seven is a pure substance, neither acidic nor basic, eight is the least basic measurement while 14 is the most basic of the bases.
draw a diagram of the structure of the following atoms and state their electron arrangement:
(i) Mg
(ii)Ca
Answers
The diagrams of the arrangement of the electrons in calcium and magnesium have been shown in the image attached to this answer. There are two electrons in the valence shell of calcium.
How are the electrons arranged?We know that the electrons are the subatomic particles that we can be able to see in the shells of the atom. It is important that we ought to know that the electrons are the particles that are known to be responsible for the reactivity of the atom.
The number of the electrons that we can find in the atom would depend on the number of the protons that we have in the nucleus of the atom and this is because for the atom to be electrically neutral then we would have to have the same number of electrons and protons being in the atom as we know.
It is clear that calcium is a member of group two of the periodic table and that magnesium is also a member of group two of the periodic table.
The structures for calcium would have Ca and two dots while that of magnesium would have Mg and two dots.
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Why is it important for scientists to use the scientific method?
Answers
Answer:
The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. ... That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.
Answer:
to get used to them
Explanation:
you have to practice them so that they can get into your head
1. What class of drugs are being investigated in this study, and how do they get into our waterways? 2. What is a C-start and why is it important for larval fish survival? 3. What hypotheses are being tested in this investigation? 4. Briefly describe what the researchers found when they exposed larval fathead minnows to levels of antidepressants found in our waterways.
Answers
The effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.
1. The class of drugs being investigated in this study is antidepressants. They enter our waterways through excretion by individuals taking the medication, and disposal of unused medication into toilets or sinks that are connected to wastewater treatment plants.
2. C-start is an evasive maneuver that young fish use when they perceive a predator. This is important for larval fish survival because it helps them to avoid being eaten by predators.
3. In this investigation, researchers are testing two hypotheses. The first is that exposure to low levels of antidepressants can affect larval fathead minnows' behavior, and the second is that the effects of exposure will be more pronounced in fish that have been raised in a less stressful environment.
4. The researchers found that exposure to antidepressants at levels found in waterways can have a significant impact on the behavior of larval fathead minnows. Specifically, they found that the fish exposed to antidepressants were less likely to respond to the presence of predators, which could increase their risk of being eaten.
They also found that the effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.
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please answer these questions. thanksss so much!!!!
Answers
The balanced equation of magnesium and sulfuric acid is:
Mg (s) + H₂SO₄(aq) ---> MgSO₄ (aq) + H₂ (g)The student was have seen an explosive reaction if sodium was placed in water.
The order of the reactivities of the metals from most to least reactive is: lithium >> calcium >> copper
It would be difficult to determine the order of reactivity of magnesium and zinc because they show the same reaction. This can be determined by finding out which metal displaces the other from the solution of their salt.
What are reactive metals?
Reactive metals are metals that easily form positive ions by readily giving up or donating their electrons.
The reactive metals are mainly found in group 1A and group 2A of the periodic table.
Reactive metals react with water to liberate hydrogen gas.
For example: 2 Li (s) + 2 H₂O ---> 2 LiOH (aq) + H₂ (g)
Reactive metals react with dilute acids to liberate hydrogen gas and form salts.
Mg + 2 HCl (aq) ---> MgCl₂ (aq) + H₂ (g)
The rate of the reactions above decreases with a decrease in the reactivity of the reactive metals.
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pls help meeee 06.01 BIOTECHNOLOGY
Biotechnology Activity
Now that you are more familiar with the benefits, risks, and impacts of biotechnology, it is time for you to take a stand! Your task is to choose one of the following types of biotechnology: genetic engineering, cloning, or artificial selection.
You will then write a one- to two-paragraph summary describing your chosen type of biotechnology. You will then need to argue for either the benefits or the risks of your chosen type. Your arguments should present your position, and then give the evidence that led you to this position. Be sure to include the following in your argument:
a description of your chosen type of biotechnology (genetic engineering, cloning, or artificial section)
one benefit or one risk for the individual (based on whether you are for or against it)
one benefit or one risk for society (based on whether you are for or against it)
one benefit or one risk for the environment (based on whether you are for or against it)
A picture (you may hand draw, take photos in nature, or use stock images)
You may get creative on this activity. You may choose to create a brochure, write a letter, or create a presentation using software. If you are unsure if your idea or software for a presentation will work, contact your instructor for assistance.
Answers
A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.
Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.
For example, farmers may selectively breed crops to make them resistant to pests or droughts.
One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.
One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.
One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.
Attached is an image of a farmer selectively breeding crops.
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in the correct lewis structure for ch4 how many unshared electron pairs surround the carbon?
Answers
In the correct Lewis structure for CH4 (methane), there are no unshared electron pairs surrounding the carbon atom.
Methane consists of a carbon atom bonded to four hydrogen atoms. Each hydrogen atom shares one electron with the carbon atom, forming four sigma bonds. Carbon has four valence electrons, and each hydrogen contributes one valence electron, resulting in a total of eight valence electrons in the molecule.
To represent this structure in a Lewis structure, we place the carbon atom in the center and connect it to the four hydrogen atoms through single bonds. The carbon atom is surrounded by four regions of electron density, which are the four sigma bonds. Since there are no unshared electron pairs around the carbon atom, it follows the octet rule, achieving a stable configuration.
Therefore, in the correct Lewis structure for CH4, the carbon atom is surrounded by four sigma bonds, with no unshared electron pairs.
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ANSWER PLEASE ..Which property of an element would be MOST helpful in determining its column in
the periodic table?
Answers
The column number of an element in the periodic table is generally determined on the basis of the number of valence electrons. The elements in the same column have similar chemical properties.
What are valence electrons?The electrons present in the outermost shell of an atom which take part in chemical reactions are called the valence electrons. These electrons are responsible for the interaction between the atoms and the formation of chemical bonds.
The valence electrons of an atom also gives us an idea about the chemical properties of elements like valency, the number of unpaired electrons present, etc. The column number of an element is mainly determined on the basis of number of valence electrons.
The elements are placed in vertical columns in the periodic table. There are 2 electrons in the outermost shell of Alkaline earth metals. So they belong to second column.
Thus it is the valence electron which determines the column number.
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PLS HELP I REALLY NEED IT IM ON THE VERGE OF TEARS
How many liters of O2 at STP will react with 8.7 grams of C2H4 to form CO2 and H2O?
C2H4 + 3 O2 -------> 2 CO2 + 2 H2O
the answers could be
22
21
2.3
I though the answer would be 26.1 PLSPLSPLS HELP
Answers
The volume of O₂ : 21 L
Further explanationGiven
8.7 grams of C₂H₄
Required
Volume O₂
Solution
Reaction
C₂H₄ + 3 O₂ ⇒ 2 CO₂ + 2 H₂O
mol C₂H₄(MW= 28 g/mol) :
= mass : MW
= 8.7 g : 28 g/mol
= 0.311
From the equation, mol O₂ :
= 3/1 x mol C₂H₄
= 3/1 x 0.311
= 0.933
At STP, 1 mol gas=22.4 L, so for 0.933 mol :
= 0.933 x 22.4 L
= 20.899 L ≈ 21 L
ammonia, nh 3 , and alcohol, c 2 h 6 o, are released together across a room. which will yousmell first?
Answers
It is likely that we would smell ammonia before we smell ethanol in this scenario. The correct option is (NH3).
Ammonia (NH3) has a lower molecular weight (17 g/mol) and a higher vapor pressure than ethanol (C2H6O, 46 g/mol), which means it will evaporate more easily and diffuse faster through the air.
Additionally, ammonia is highly soluble in water, which means it will quickly dissolve in any moisture in the air and become more concentrated, making it more likely to reach our noses.
In general, the speed at which a substance diffuses through air and reaches our nose (and thus our olfactory receptors) depends on a variety of factors, such as the volatility (vapor pressure) of the substance, its molecular weight, and its solubility in air.
However, it's important to note that individual sensitivity to smells can vary, and factors such as the distance between the person and the source of the odor, the concentration of the substances in the air, and the individual's olfactory threshold can all play a role in determining which odor is detected first.
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So I have an F in science, and everything is due today. Am I going to fail 9th grade because I didn't pass that class?
Answers
Answer:
i dk how ur school works, but you'll most likely have to take that science again to get the credits u need to graduate
Explanation:
he long run equilibrium condition for perfect competition is:
a. P=AVC=MR=MC.
b. Q=AVC=MR=MC.
c. Q=ATC=MR=MC.
d. P=ATC=MR=MC.
Answers
Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.
The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).
Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.
In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.
Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.
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which of the following plant structures provides most of the water necessary for photosynthesis?
Answers
The main plant structure that provides most of the water necessary for photosynthesis is the root system.
The root system of a plant is responsible for absorbing water from the soil. It consists of roots that extend deep into the ground, allowing the plant to access water from underground sources such as groundwater or moisture in the soil. Through a process called osmosis, water moves into the roots and is transported to the rest of the plant, including the leaves where photosynthesis takes place.
The water absorbed by the roots provides the necessary hydration for the photosynthetic process, allowing plants to produce glucose and oxygen using sunlight and carbon dioxide. Thus, the root system plays a vital role in providing most of the water required for photosynthesis in plants.
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Which of these do plants need for photosynthesis to occur?
OA.
glucose and water
ов.
glucose and carbon dioxide
OC.
water and carbon dioxide
OD.
water and oxygen
Answers
Answer:
OC. water and carbon dioxide
Explanation:
The equation for photosynthesis is Carbon dioxide plus water plus light energy yields sugar (glucose) and oxygen
Answer:
Water and carbon dioxide
Explanation:
We learned this in Grade 2.
Substance A has a higher heat capacity than substance B if the same amount of heat is added of heat is added to both substances which substance will increase in temperature more rapidly
Answers
Answer:
Substance B
Explanation:
Heat capacity is a measure of how much energy is needed to raise the temperature of an object.
A high heat capacity means that an object requires large amounts of heat energy to change/increase its temperature. It can take in a lot of heat energy before it starts changing temperature.
A low heat capacity means that an object requires a minimal amount of heat energy to change/increase its temperature. It can start changing more rapidly as compared to objects with higher heat capacities.
So, if the same amount of heat is added to both substances (Substance A and Substance B), the substance that will increase in temperature more rapidly is Substance B.
how to unscramble dtneinreigs
Answers
Answer:
Ingredients OR tenderising
Explanation:
Determine the entropy of formation, AS, of the following compounds. Assume 25°C. (a) H20 (e) (b) H2O (g) (c) Fe2(SO) (d) Al2C3
Answers
The entropy of formation of
(a) H20 is 69.95 J/mol K.
(b) H2O is 188.84 J/mol K.
(c) Fe2(SO) is 315.7 J/mol K.
(d) Al2C3. is 315.7 J/mol K.
To determine the entropy of formation (ΔS) for the following compounds at 25°C: (a) H2O, (b) H2O, (c) Fe2(SO), and (d) Al2C3. However, it seems there's a typo in compound (c). I assume you meant Fe2(SO4)3. Here are the entropy values for the compounds you provided:
(a) H2O (liquid): The entropy of formation (ΔS) for liquid water at 25°C is 69.95 J/mol K.
(b) H2O (gas): The entropy of formation (ΔS) for water vapor at 25°C is 188.84 J/mol K.
(c) Fe2(SO4)3: The entropy of formation (ΔS) for iron(III) sulfate at 25°C is 315.7 J/mol K.
(d) Al2C3: The entropy of formation (ΔS) for aluminum carbide at 25°C is 315.7 J/mol K.
These values are obtained from standard reference tables and can be used for various thermodynamic calculations involving the compounds mentioned.
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The process of sharing power with employees, thereby enhancing their confidence in their ability to perform their jobs and their belief that they are influential contributors to the organization is known as ________. A. Empowerment B. job enrichment C. growth need strength D. restoring equity E. expectancy
Answers
The process described, which involves sharing power with employees to enhance their confidence and belief in their ability to contribute to the organization, is known as empowerment.
The correct option is A. Empowerment
Empowerment refers to the process of delegating power and authority to employees, granting them the autonomy and decision-making capabilities to perform their jobs effectively. It involves sharing power and responsibility, allowing employees to take ownership of their work and contribute to the organization in a meaningful way. By empowering employees, organizations aim to enhance their confidence, job satisfaction, and motivation, leading to improved performance and productivity.
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Consider the chemical equation. 2NBr3 + 3NaOH Right arrow. N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?
Answers
Answer:
NBr₃ is the excess reactant.
Explanation:
2NBr₃ + 3NaOH → N₂ + 3NaBr + 3HOBrWe can solve this problem by calculating how many moles of NaOH would react completely with 40 moles of NBr₃, using the stoichiometric coefficients of the reaction:
40 mol NBr₃ * \(\frac{3molNaOH}{2molNBr_3}\) =60 moles NaOHAs the required number of NaOH moles is higher than the available number (60 required vs 48 available), NaOH is the limiting reactant.
As such, the excess reactant is NBr₃.
Q-3 Determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and change in the chemical potential between this state and a second state od ethane where temperature is constant but pressure is 24 atm.
Answers
The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system. Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT
=> P
= nRT/V
=> 20.4 atm
= nRT/V
=> n/V
= 20.4/RT The chemical potential of the system at the initial state is:
Δu1 = RT ln (f/P)
= RT ln (f/20.4) Also, we know that for a pure substance,
Δu = Δg. So,
Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm
= 3.6 atm At the second state, the pressure is 24 atm.
Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is
Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)
= RT ln [(f/24)/(f/20.4)]
= RT ln (20.4/24)
= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:
f = P.exp(Δu/RT)
=> f
= 20.4 exp (-Δu1/RT)
=> f
= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
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Calculate the atomic mass of the following elements from
the percentage of their isotopes.
78.99% of 24 Mg, 10.00% of 25 Mg, 11.01% of 26 Mg
Answers
Answer: 24.32 AMU
Explanation:
See attachment.
Brainliest and more points if you do all 3
Answers
evaporation- conversion of a liquid to a gas due to an increase in temperature and or pressure.
precipitation- when it rains, snows, hails, sleets. conversion of a liquid to a solid.
Given that the magic numbers for protonsIneutrons are 2, 8, 20,28,50, 82,and 126,which ofthe following are double magic nuclei? Select all that apply: 160 Ca 78Ni 62 Ni
Answers
The double magic nuclei among the given options are 16O and 78Ni.
Based on the magic numbers for protons and neutrons, the double magic nuclei are the ones that have both their proton and neutron numbers as magic numbers. From the given options:
1. 16O (Oxygen-16): It has 8 protons and 8 neutrons, both of which are magic numbers. So, 16O is a double magic nucleus.
2. 78Ni (Nickel-78): It has 28 protons (a magic number) and 50 neutrons (a magic number). Therefore, 78Ni is a double magic nucleus.
3. 62Ni (Nickel-62): It has 28 protons (a magic number) but 34 neutrons, which is not a magic number. Thus, 62Ni is not a double magic nucleus.
So, the double magic nuclei are 16O and 78Ni.
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