2. On a separate piece of paper balance each of the following equations by adding appropriatecoefficient. Show all your work for each.a.NaOH +(NH4)3PO4 →Na3PO4 +H2O +NH3b.C2H50 +02 →CO2 +H2OC.Mg3N2 +H2O →Mg(OH)2 +NH3d.C8H18 +O2 →CO2 +H2Oe.C12H22011 +O2 →CO2 +H2Of.H2C2O4 +CaCl2 →CaC2O4 +HCI
Answers
A. 3 NaOH + (NH4)3PO4 -> Na3PO4 + 3 H2O + 3 NH3
B. C2H6O + 3 O2 -> 2 CO2 + 3 H2O
C. Mg3N2 + 6 H2O -> 3 Mg(OH)2 + 2 NH3
D. 2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O
E. C12H22O11 + 12 O2 -> 12 CO2 + 11 H2O
F. H2C2O4 + CaCl2 -> CaC2O4 + 2 HCl
Related Questions
biochem chapter 8 analyze the data and complete the following sentences. match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
Examine experimental data
Consider the following experimental data that were obtained for two different enzymes, A and B, to determine their reaction rate or velocity under varied substrate concentrations, [S].
Table for Enzyme A Table for Enzyme R
(S)x 10-³. reaction rate. (S)x10-³. reaction rate
(mmol/L). (mmol/s). (mmol/L) (mmol/s). 1. 29. 2. 2.5
2. 45. 3. 3.9
5. 30. 6. 6.5
6. 20.8. 8. 8
7. 65. 12. 10
8. 80. 24. 13.5
9. 90. 36. 16
12. 112. 40. 16 For enzymes obeying the Michaelis-Menten equation, a graph that plots the reaction rate or velocity as a function of substrate concentration will be a hyperbolic curve. This curve can be
used to determine Vmax and KM, where Vmax is the maximum velocity of the reaction (maximum rate), and KM is the substrate concentration when the velocity is half its maximum.
8
shows no trend
decreases uniformly
40 × 10-³
a linear
8 × 10-³
x
Increases uniformly
a hyperbolic
A
no defined
40
B
16
Of the two enzymes studied, when plotting concentration versus reaction rate, enzyme A produces a
plot with
shape and enzyme B produces a plot with
shape.
The reaction rate of enzyme A
saturation point, and the reaction rate of enzyme
Given this data, enzyme
this plot, the estimated value of Vmax is
mmol/L.
as the concentration of substrate increases to its
over the same set of conditions.
obeys the Michaelis-Menten equation. Analyzing the shape of
mmol/s and KM is
Answers
Of the two enzymes studied, when plotting concentration versus reaction rate, enzyme A produces a hyperbolic plot and enzyme B produces a linear plot.
The reaction rate of enzyme A increases uniformly, reaches a saturation point, and the reaction rate of enzyme B decreases uniformly over the same set of conditions.
Given this data, enzyme A obeys the Michaelis-Menten equation. Analyzing the shape of this plot, the estimated value of Vmax is 112 mmol/s and KM is 8 × 10-³ mmol/L. For enzyme B, there is no defined saturation point and the reaction rate decreases uniformly.
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What is the ph value of human saliva
Answers
The ph value of human saliva is between 6.2-7.6 with 6.7 being the average pH
ph value of human saliva is 7 and 6
Why does ear escape from a tire when a tire valve is opened
Answers
Air escape from a tire when tire valve is opened because the pressure from the weight of the car is forcing the already pressurized air out .
Why does air escape from tire when tire valve is opened?When air is filled in tires, it get into more compact area than the outer atmosphere, therefore particles in tire are close to each other and exert pressure continuously on tire walls to get out of it. Thus, material of the tire need to be pressure resistant as much possible.
After opening the tire valve, air starts leaving with huge sound as strain outside the tire is weaker than that inside the tire. Molecules strike with the same force on larger area and pressure starts diminishing.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Air leaves a tire when the tire valve is opened because
A. the pressure outside the tire is lower than the pressure inside the tire.
B. the pressure outside the tire is greater than the pressure inside the tire.
C. the temperature is higher outside the tire than inside the tire.
D. there are more gas particles outside the tire than inside the tire.
watch the video included in between steps 2 and 3 under preparing the cu2 calibration curve. using what you learned about nh3 in general chemistry i and the solubility rules, identify the precipitate that form when nh3 is initially added to the copper sulfate solutions. canvas doesn't allow you to use subscripts in the answers to fill in the blank questions, so use the format h2o vs h2o or fe(no3)3 vs fe(no3)3 if a subscript is needed.
Answers
Option c is the correct response since the original concentration of Cu+2 is 2*0.019 M = 0.038 M after mixing the 5 ml unknown material with the 5 ml NH3 solution.
In chemistry, what does "concentration" mean?The amount of solute in a certain volume of solution is how concentrated a material is. Concentrations are expressed in terms of molarity, or the amount of solute per liter of solution.
What is the most accurate way to define concentration?the condition of being focused: the act or activity of focusing. more specifically: focusing on a particular thing. My attention is being disrupted by all that noise. : a major or region of concentration within a major.
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Chemistry Help Please! Worth a lot of points!
1. Joseph Priestly was the first scientist to be able to prepare pure oxygen gas. He did this by heating mercuric oxide as shown in the reaction below. Answer the question related to the reaction.
2HgO(s) = 2Hg(l) + O2(g)
a.What volume of oxygen gas would be produced at STP through the decomposition of 5.36 grams of HgO? It is not collected over water!
b. What volume of oxygen gas would be produced at 23o and 0.975 atm by the decomposition of 5.36 grams of HgO?
c. What volume of oxygen gas would be collected over water at 23oC and 0.975 atm by the decomposition of 5.36 grams of HgO?
2. How many grams of water will form through the reaction of 550 mL of 2.5 M HCl and an excess amount of Ca(OH)2?
Ca(OH)2(aq) + 2HCl(aq) = CaCl2(aq) + 2H2O(l)
a. How many grams of calcium chloride will form if 250 mL of 2.0 M Ca(OH)2 reacts with 350 mL of 2.5 M HCl? Make sure to determine the limiting reagent!
3. Sam conducted an experiment where he reacted 5.0 grams of magnesium with an excess amount of oxygen gas to form magnesium oxide (MgO). When he conducted this in the lab, he obtained 8.06 grams of magnesium oxide.
a. Write and balance the chemical reaction.
b. Use stoichiometry to predict how many grams of magnesium oxide should form.
c. What is the theoretical yield?
d. What is the actual yield?
e. Calculate the percent yield.
4. Na(s) + Br2(L) = NaBr(s) (not balanced)
b.If 3.05 grams of sodium react with 10.0 grams of diatomic bromine, what is the excess reagent AND how many moles of excess reagent are present after the reaction?
c. How many grams of sodium bromide are formed?
Answers
Answer:
A.
1. a. 11.28L O2
b. 24.3L O2
c. 19.83L O2
2. a. 5.6 grams CaCl2
3. a. 2Mg + O2 = 2MgO
b. 8.06 grams MgO
c. 8.06 grams MgO
d. 8.06 grams MgO
e. 100%
4. a. 2Na + Br2 = 2NaBr
b. Excess reagent: Bromine; 0.5 moles
c. 10.6 grams NaBr
Pollen______
contains female egg cells
is created by mitosis
is produced by the pistil
sticks to the stigma
Answers
good luck
An early arrangement of the then known elements was proposed by a British scientist John Newlands, which he called the Law of Octaves. Like other scientists at the time, Newlands arranged the elements in order of increasing atomic mass and noted that every eighth element had similar physical/chemical properties. In the modern Periodic Table, which of the following represents the last pair of elements for which Newlands' Law of Octaves would hold true?
Answers
Select the true statements about denaturation.
a. Denaturation and digestion refer to the same process.
b. Denaturation of an enzyme will cause a loss of its catalytic activity.
c. A zymogen is a denatured form of a proteolytic enzyme.
d. Egg white meringue contains denatured egg white proteins.
e. A denatured protein has a different tertiary structure than its native state.
f. Protein denaturation involves cleavage of its peptide bonds.
Answers
Answer:
The correct options are: Denaturation of an enzyme will cause a loss of its catalytic activity.
Egg white meringue contains denatured egg white proteins.
A denatured protein has a different tertiary structure than its native state.
Protein denaturation involves cleavage of its peptide bonds.
Explanation:
Protein denaturation is the breakdown of tertiary or quaternary junctions of proteins, which are the easiest to break compared to primary and secondary.
Denaturation can arise due to a change in pH or due to excess temperature. An enzyme is generally a protein and if it is subjected to acidic acids or high temperatures, it denatures, ceasing to perform its function.
Zymogen is a non-denatured INACTIVE proenzyme, that is why we consider that option false along with those that were not selected.
The statements true about the denaturation has been statement b, d, e, and f.
Denaturation can be described as the process for the rupture of the tertiary and quaternary structure of the protein with the change in pH or the reaction or change in the chemical environment.
The quaternary structure of the enzyme has been responsible for the catalytic activity. Denaturation of an enzyme will cause a loss of its catalytic activity. Thus statement b is true.Egg white protein has been simple denatured protein. Thus, egg white meringue contains denatured egg white proteins. Statement d is true.The denaturation will distort the shape of the protein. A denatured protein has a different tertiary structure than its native state. Thus statement e is true.The rupture of structure has been based on the rupture of the peptides bond. Thus statement f is true.For more information about denaturation, refer to the link:
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What percent of the compound is made of Silver? *
Silver Nitrate, AgNO3?
Answers
Approximately 63.5% of the compound AgNO3 is made of silver.
The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.
The molecular weight of AgNO3 is:
AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)
AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)
AgNO3 = 169.87 g/mol
The percent by mass of silver in AgNO3 can be calculated as:
Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100
Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.
Therefore, the percent by mass of silver in AgNO3 is:
Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100
Percent by mass of silver = 63.5%
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Give the mechanism for the reaction:
Answers
The reaction of 2-Bromo-2-Ethyl-3-Methylbutane with methanol is an example of a nucleophilic substitution reaction.
What is the mechanism of the reaction?In this reaction, the methanol molecule acts as a nucleophile and attacks the carbon atom of the bromoalkane, resulting in the displacement of the leaving group (bromine) and the formation of a new carbon-oxygen (C-O) bond.
The reaction mechanism can be described as follows:
Protonation: In the first step, the methanol molecule acts as a base and abstracts a proton from the sulfuric acid catalyst to form the methoxide ion (CH3O-).
Nucleophilic attack: The methoxide ion then attacks the carbon atom of the bromoalkane, which is electrophilic due to the electron-withdrawing effect of the bromine atom. The attack results in the formation of a transition state in which the carbon-bromine bond is weakened and the carbon-oxygen bond is forming.
Elimination: The transition state then collapses to form the product, methylethylmethylcarbinol, with the simultaneous loss of the bromide ion. This step is known as the elimination step and occurs as the newly formed C-O bond is more stable than the weakened C-Br bond.
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which compoud is propanic acid
Answers
Answer:
Explanation:
Propionic acid has chemical formula of C₃H₆O₂ , and smells somewhat unpleasant (like body odour).
The hydrophobic effect is the primary driving force for protein folding because: Question 4 options: a) A folded protein is able to form the most hydrogen bonds b) An unfolded protein maximizes the entropy of a biological system c) A folded protein maximizes the entropy of water
Answers
Identify whether the solubility of Ag_2CrO_4 will increase or decrease by adding the following agents.
a. Na2CrO4
b. HCl
c. NH3
Answers
b) with addition of HCl silver chromate solubility will increase as silver chromate reacts with HCl to produce silver chloride precipitate (white). silver chromate is red-brown color hence it can be easily distinguished
c) with NH3 silver chromate will form diamine complex and results in increased solubility of silver chromate
Three 15.0 mL acid samples - 0.10 M HA, 0.10M HB, and 0.10 M H2C - are all titrated with 0.100 M NaOH.If HA is a weak acid, HB is a strong acid, and H2C is a diprotic acid, which statement is true of all three titrations?
All three titrations have the same final pH.
All three titrations require the same volume of NaOH to reach the first equivalence point.
All three titrations have the same pH at the first equivalence point.
All three titrations have the same initial pH.
Answers
All three titrations require the same volume of NaOH to reach the first equivalence point.
The type of acid used in the titration determines the pH of the result: a strong acid results in a pH of 7 at the titration's equivalent. Equivalence point for a weak acid is influenced by the type of conjugate base and weak acid's beginning pH. The type of the acid is another factor for a diprotic acid.
Thus:
The initial pH of all three titrations is the same, as is the pH at the first equivalence point in all three titrations. Moreover, the final pH of all three titrations is the same. of the three are FALSE.
Thus:
To reach the first equivalence point, all three titrations need the same volume of NaOH.
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If HA is the weak acid, HB is the strong acid, and H₂C is a diprotic acid, the statement is true for the titrations is All three titrations require the same volume of NaOH to reach the first equivalence point.
The pH of the titration is depend on the nature of acid. here the the HA is the weak acid and the HB is the strong acid. the H₂C is the diprotic acid. the diprotic acid means the acid which contains the two hydrogen atoms and will ionized in the water.
Thus, the from all the statements the true one is that All three titrations require the same volume of NaOH to reach the first equivalence point.
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2. Write the Lewis structure for N2F2. Draw two isomers and determine whether they are polar or non-polar.
Answers
Answer: The 2 nitrogens are the central atoms. They are bonded together by a double bond and each have one lone pair of electrons. The 2 fluorines each bond to one side of the nitrogen and have 3 lone pairs each.
Explanation:
The resistance in a circuit is halved. What happens to the voltage?
V=IR
The voltage remains the same.
The voltage is halved.
The voltage is doubled.
]
The voltage is increased by a factor of 4.
Answers
When the resistance in a circuit is halved, the voltage increases by a factor of 4. This relationship is known as Ohm's law, which states that voltage (V) is equal to current (I) multiplied by resistance (R) in a circuit, or V = I x R.
If the resistance in a circuit is halved, then R in Ohm's law is divided by 2, which means that the voltage (V) across the circuit increases by a factor of 2, assuming that the current (I) remains constant.
However, the current (I) in the circuit may also change if the resistance is altered. If the voltage source remains constant and the resistance is halved, then the current (I) will double, as per Ohm's law. Therefore, the voltage (V) across the circuit will increase by a factor of 2 x 2 = 4, which is four times its original value.
This is because the current in the circuit also changes when the resistance is altered, according to Ohm's law.
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5. An alcoholic drink containing 216.0 g of H2O and 9.2 g of ethanol (C2H5OH) is bottled by
adding CO2. If the mole fraction of water is 0.9 what approximate mass of CO2 is dissolved in it?
Answers
The mass of carbon dioxide, CO₂ dissolved in the alcoholic drink, given that 216.0 g of H₂O and 9.2 g of ethanol is bottled by it is 49.72 grams
How do i determine the mass of CO₂ dissolved?First, we shall determine the mole of 216.0 g of H₂O and 9.2 g of ethanol. Details below:
For H₂O
Mass of H₂O = 216 grams Molar mass of H₂O = 18 g/mol Mole of H₂O =?Mole = mass / molar mass
Mole of H₂O = 216 / 18
Mole of H₂O = 12 moles
For C₂H₅OH
Mass of C₂H₅OH = 9.2 grams Molar mass of C₂H₅OH = 46 g/mol Mole of C₂H₅OH =?Mole = mass / molar mass
Mole of C₂H₅OH = 9.2 / 46
Mole of C₂H₅OH = 0.2 mole
Next, we shall obtain the mole of CO₂. Details below:
Mole of H₂O = 12 molesMole of C₂H₅OH = 0.2 moleMole of krypton, Kr = 0.439 mole Mole fraction of H₂O = 0.9Mole of CO₂ =?Mole fraction of H₂O = Mole of H₂O / total mole
Total mole = Mole of H₂O / Mole fraction of H₂O
Total mole = 12 / 0.9
Total mole = 13.33
But
Total mole = mole of H₂O + mole of C₂H₅OH + mole of CO₂
13.33 = 12 + 0.2 + mole of CO₂
13.33 = 12.2 + mole of CO₂
Collect like term
Mole of CO₂ = 13.33 - 12.2
Mole of CO₂ = 1.13 mole
Finally, we shall determine the mass of CO₂. Details below:
Mole of CO₂ = 1.13 moleMolar mass of CO₂ = 44 g/mol Mass of CO₂ = ?Mass = Mole × molar mass
Mass of CO₂ = 1.13 × 44
Mass of CO₂ = 49.72 grams
Thus, we can conclude that the mass of CO₂ dissolved is 49.72 grams
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Calculate the pH and percent ionization of a HC2H3O2 solution with a concentration of 0.500 M. (Ka = 1.8 x10-5)
Answers
Answer:
I can not see the file
Explanation:
Which of the following items are made from renewable resources? Select the two correct answers. (1 point)
Responses
plastic fork
plastic fork
metal can
metal can
leather jacket
leather jacket
electronics
electronics
printer paper
Answers
A leather jacket and printer paper are examples of items that can be made from renewable resources, while plastic forks, metal cans, and electronics are not considered renewable due to their reliance on non-renewable materials and processes. Option C, E
The two correct answers that are made from renewable resources are:
C) Leather jacket: Leather is derived from animal hides, which are a byproduct of the meat industry. As long as there is a sustainable and responsible approach to animal farming, the production of leather can be considered renewable. The hides are obtained from animals that are raised for meat consumption, and their use in leather production helps reduce waste.
E) Printer paper: Printer paper can be made from various sources, including trees, bamboo, and recycled paper fibers. If the paper is sourced from sustainably managed forests or from fast-growing plants like bamboo, it can be considered renewable. Additionally, the use of recycled paper fibers reduces the demand for materials and promotes a more circular economy.
The other options, A) plastic fork, B) metal can, and D) electronics, are not made from renewable resources:
A) Plastic fork: Plastics are typically derived from fossil fuels, which are non-renewable resources. The production of plastic involves the extraction and processing of petroleum or natural gas, both of which are finite resources.
B) Metal can: Metal cans are predominantly made from aluminum or steel. While these metals can be recycled, their initial production requires the extraction of raw materials from the Earth, which is not a renewable process.
D) Electronics: Electronics are made from a wide range of materials, including metals, plastics, and various chemical compounds. The production of electronics involves the extraction of raw materials, many of which are non-renewable resources.
Option C and E.
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Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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Based on the ideal gas law, there is a simple equivalency that exists between the amount of gas and the volume it occupies. At standard temperature and pressure (STP; 273.15 K and 1 atm , respectively), one mole of gas occupies 22.4 L of volume. What mass of methanol ( CH3OH ) could you form if you reacted 7.82 L of a gas mixture (at STP) that contains an equal number of carbon monoxide ( CO ) and hydrogen gas ( H2 ) molecules?
Answers
You could form approximately 5.8 grams of methanol (CH3OH) from the given gas mixture at STP.
What is the mass?
Using the Ideal gas equation;
n = PV / RT
n = (1 atm * 7.82 L) / (0.0821 L·atm/(mol·K) * 273.15 K)
From the question;
nCO = n / 2
nH2 = n / 2
Then;
n = (1 atm * 7.82 L) / (0.0821 L·atm/(mol·K) * 273.15 K)
n = 0.362 mol
nCO = n / 2 = 0.362 mol / 2 = 0.181 mol
nH2 = n / 2 = 0.362 mol / 2 = 0.181 mol
By stoichiometry;
methanol= nCO = 0.181 mol
Mass of methanol = 0.181 mol * 32.04 g/mol
= 5.8 g
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What has a higher boiling point C2H4O or CH3OH
Answers
Answer:
Explanation:
i wish i can help
Answer Question in box below Q: What is your evidence for why you think a Fan not spinning has energy or does not have energy-explain in detail?
Answers
Answer:
Yes, a fan not spinning has energy
Explanation:
Let us remember that energy is neither created nor destroyed but is transformed from one form to another. This is known as the principle of energy conservation. Hence energy in the universe never disappears!
The fan that is not spinning has potential energy. Potential energy is energy possessed by a body by virtue of its position. When the fan starts spinning, this potential energy is converted to kinetic energy.
What is the basic mechanism of immunohistochemistry technique?
Answers
Answer:
I hope this helps :)
Explanation:
Immunohistochemistry (IHC) is a powerful technique that exploits the specific binding between an antibody and antigen to detect and localize specific antigens in cells and tissue, most commonly detected and examined with the light microscope.Jan 1, 2020
Which of the following equations shows a chemical change?
NH3(g) → NH3(1)
H₂O(s) → H₂O(g)
C3Hg +50₂ → 3CO₂ + 4H₂O
C₂H₂OH(1)→ C₂H5OH(g)
Answers
If you are on 4.16 Chemical Reactions and have 18 questions, then go to the following on Quizlet for further help. Thanks and good luck!
Quizlet - "4.6 Chemical Reactions UT"
h t t p s : / / q u i z l e t . c o m / _ c 7 3 1 u j ? x = 1 q q t & i = 3 8 n a a s
All the given chemical reactions are considered to be chemical change as they are accompanied by change in state and even evolution of gases.
What is chemical change?
Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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I need a lil help here plzzzzzzzz
Answers
Answer:
The southern hemisphere is currently experiencing "Summer"
Explanation:
The Southern hemisphere is experiencing summer because it is closer to the sun than the Northern Hemisphere and also, direct light is more hotter than indirect light.
So, first, let's try an EXPERIMENT!
Take a VERY bright flashlight or a very small laser that can't harm you or just burn a paper in 1 second.
Then, take a piece of paper, or maybe just your skin, (like your hand) and place it under the light or laser, (for the laser, you should probably take the paper), and place the light source right above your skin, then, after some time, when it gets hot, measure the temperature. (around like 30 seconds later),
Note down the temperature...
Now, do the same thing, accept, do it in a very weird angle, face it towards your paper or hand, but, do it in an angle. More than like 30 degrees. Then, after some time, note down the temperature.
You probably, noticed, that the direct light (the one with the straight light facing your paper or skin, was hotter). Look at the image below, and you can understand better.
So, the same thing applies to the earth. The southern hemisphere in this picture is facing more directly to the sun than the northern hemisphere. That is why your answer is
SUMMERThank you! Please mark me Brianliest!
Remember to have fun, and a nice day!
Answer: summer
Explanation:
The force that gravity exerts on an object is
Question 7 options:
It's Acceleration
It's Weight
It's Mass
Constant
Answers
Answer:
gravity exerts on it's mass brother
Which of the following is NOT true of zinc?
-Excess zinc can decrease copper absorption.
-Grains are the most reliable food sources of zinc.
-All of its functions involve it acting as a cofactor for enzymes.
-It binds to most proteins in the body.
Answers
while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.
How to solve the problem?
The statement that is NOT true of zinc is "Grains are the most reliable food sources of zinc." While grains can be a source of zinc, they are not necessarily the most reliable source.
Zinc is an essential mineral that plays important roles in many biological processes, including immune function, protein synthesis, wound healing, and DNA synthesis. It is involved in various enzymatic reactions, and acts as a cofactor for many enzymes. Zinc is also important for proper growth and development, especially during childhood and adolescence.
Excess zinc intake can lead to decreased copper absorption, as both minerals compete for absorption in the intestines. This can lead to copper deficiency, which can cause anemia neutropenia, and other health problems. Therefore, it is important to maintain a balance between zinc and copper intake.
While grains can be a source of zinc, other foods such as meat, seafood, and dairy products are also good sources. Vegetarians and vegans may need to pay particular attention to their zinc intake, as plant-based sources of zinc may be less bioavailable than -based sources. Zinc supplements can also be used to prevent or treat deficiencies, but should be used with caution as excessive intake can have negative health effects.
In summary, while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.
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HELPP PLZ FAST WILL GIVE BRAINLIEST
Benzene, a nonpolar, colorless solute, is most commonly found in oil and is a major component in gasoline.
In which of these two solvents will benzene most likely dissolve?
Solvent
Characteristics
A
Carbon tetrachloride
• Colorless liquid, noncombustible
• Nonpolar
Ethanol
• Flammable, colorless liquid
• Polar
Methanol
• Distinctive odor; volatile, colorless liquid
• Polar
Cyclohexane
• Strong odor; flammable; colorless liquid
• Nonpolar
OA
OB
ОС
OD
Answers
The aromatic region (7-8 ppm) of the proton NMR spectrum of compounds with para disubstituted benzene rings such as phenacetin is often referred to as an AB pattern. This pattern has two doublet signals coupled to each other. Explain the origin of this AB pattern.
Answers
The aromatic ring in phenacetin exhibits an AB pattern because it has two mutually coupled nuclei that are unrelated to other protons or whose shift differences is equal to the coupling constant.
Why are protons present on deshielded benzene?Deshielding occurs for the ring protons of benzene due to their larger chemical shift (7.3 ppm vs. 5.6 ppm for the vinylic protons in cyclohexene) and the fact that the magnetic field induced outside of the ring is the same orientation as that of the external field.
What frequency band does benzene proton NMR display?Protons are present in benzene at levels of 6–8 ppm.This value is larger than that of the protons in those other hydrocarbon like alkanes & alkenes because of the aromatic ring's deshielding effect.
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