Accurate radiometric dating requires that a rock will contains a measurable amount of parent isotope atoms. Option A is correct.
The parent isotope undergoes radioactive decay to form the daughter isotope at a known rate, and by measuring the relative abundance of parent and daughter isotopes in a sample, the age of the sample can be calculated. If a rock does not contain a measurable amount of the parent isotope, then it cannot be accurately dated using radiometric dating techniques.
Radiometric dating is a method used to determine the age of rocks and other materials based on the decay of radioactive isotopes. Radioactive isotopes are unstable and spontaneously decay into a more stable isotope or a different element at a known rate called the half-life.
Hence, A. is the correct option.
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--The given question is incomplete, the complete question is
"Accurate radiometric dating typically requires that a rock contains a measurable amount of group of answer choices A) parent isotope atoms. B) daughter isotope atoms. C) either parent or daughter atoms. D) both parent and daughter atoms."--
SMOOTHIES: Why does adding lemon juice [to a blueberry smoothie
make it change colour from purple to pink?
Answer:
Explanation:
Cuz the color is a light yellow and water to make it loose color
The mixing of two different liquids together to form a new mixture is called a solution.
The correct option is acid.
In a solution, there are two components which are known as solute and solvent. In which solute is less in amount and solvent is more in an amount which is water.
According to the question, the smoothie turns the color to pink from purple because lemon act as an acid and changes the ph of the solution.
Hence, the Lemon act as an acid.
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true or falsethe leading edge of the solvent as it moves up the chromatography paper is called the solvent front
Answer: The leading edge of the solvent as it moves up the chromatography paper is called the solvent front. Hence the given statement is true.
Explanation: Chromatography is a separation technique. It can be paper chromatography or thin-layer chromatography. In paper chromatography, the mobile phase is the solvent and the stationary phase is silica. The sample travels with the mobile phase on the basis of polarity. Different solvents have different polarities. In organic chemistry, this is the basis for monitoring the reaction progress.
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"The leading edge of the solvent as it moves up the chromatography paper is called the solvent front" is true.
When performing chromatography, the solvent moves up the paper by capillary action. The distance traveled by the solvent up the paper is referred to as the solvent front or mobile phase front. The solvent front is the point where the solvent has reached the farthest, and its position varies depending on the type of solvent and the composition of the mixture being separated. Chromatography is a method for separating and identifying mixtures of organic and inorganic compounds. It is frequently employed in analytical chemistry, biochemistry, and environmental science to detect and measure trace quantities of substances.
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Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much.
Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice the mass.
Mass is the amount of matter present in the particle.
it is expressed in kg.
weight is the force acting on the particle due to the gravity of the earth.
It is expressed in newton N.
let in 1 kg block the mass present is x.
so in a 2 kg block, the mass will be 2x.
we can say that mass becomes twice.
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What question did this young man have about his father? und
If a chicken egg were used as a model of a cell, what type of cell would it best represent?
If a chicken egg were used as a model of a cell cytoplasm , it would best represent a eukaryotic cell. The majority of multicellular organisms have eukaryotic cells.
If a chicken egg were used as a model of a cell, it would best represent a eukaryotic cell. It would be a eukaryotic cell because an egg has a membrane-bound yolk, which holds the nutrients that the developing embryo needs to survive. This yolk is similar to the nucleus of a cell in that it contains the vital components that make the cell function. Additionally, the egg white surrounding the yolk is similar to the cytoplasm of a cell, which holds the organelles that do the actual work of the cell.
In a eukaryotic cell, the genetic material (DNA) is contained within a membrane-bound nucleus. These cells also have many membrane-bound organelles, such as mitochondria and lysosomes. They are more complex than prokaryotic cells and are typically larger than them as well. Eukaryotic cells are found in plants, animals, fungi, and protists, which are single-celled organisms.
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What is a periodic trend?
O A. An older version of the periodic table
O B. A pattern that appears on the periodic table
C. Any characteristic of the noble gases
O D. A numbering system for the periodic table
Answer:
b
Explanation:
how to safely handle acids?
Always wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron whenever using concentrated acids or acid solutions. Purchase dilute acids whenever possible Acid handling requires the use of latex gloves. Solvent and chemicals in miscellaneous category require the use of polythene gloves. Check the gloves for any pin-holes prior to use. Wash your hands before eating, even if gloves were used while handling the chemical.
i know it'sis a lot and it's a little messed up but can you handle it if you can and if it's right you mind giving me a brainliest?
Always wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron whenever using concentrated acids or acid solutions
PLEASE HELP ILL GIVE BRAINLIST!!!
How does the energy of the different waves of the spectrum vary with frequency? With wavelength?
Answer:
The greater the frequency means the more energy transferred.
The greater the wavelength means the less energy transferred
How would you change the distance between two charged particles to increase the electric force between them by a factor of 25?
Answer:
reduce the distance by the factor of 5
Which of the following is not a characterstic of a chemical change
A) ITS REVERSIBLE
B) NO NET ENERGY IS INVOLVED
C) NEW SUBSTANCE IS FORMED
D) INVOLVES ABSORBTION OR LIBERATION OF ENERGY
The correct option - B) NO NET ENERGY IS INVOLVED, is not the feature of a chemical change.
Explain about the chemical change and its properties?Chemical qualities of matter refer to its "potential" to experience a chemical reaction or change as a result of its makeup. What substances, electrons, and chemical bonds exist to provide the possibility of chemical transformation.
In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. In contrast, when matter undergoes a chemical transformation, at least single new substance with novel features is created.The general qualities of a substance including color, density, roughness, are a few instances of physical attributes. Chemical attributes are those that explain how one substance transforms into another fully. Chemical attributes include things like flammability and resistance to oxidation and corrosion.Thus, NO NET ENERGY IS INVOLVED, is not the feature of a chemical change.
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Which of the following have the empirical formula CHO?
Proteins
None of these
Nucleic Acids
Lipids
Out of the given options, none of the following have the empirical formula CHO.
The empirical formula is the simplest formula for a compound that reflects the ratio of elements present in the compound. It gives the ratio of atoms of different elements in the compound. The empirical formula can be different from the molecular formula.
Lipids are the biomolecules that are composed of carbon, hydrogen, and oxygen (CHO) in a different ratio. They are the esters of fatty acids and glycerol. They are also known as fats or oils. They are the major component of cell membranes. Lipids include fats, phospholipids, and steroids.
Nucleic acids are macromolecules composed of nucleotide units. Nucleotide units consist of a nitrogenous base, a sugar, and a phosphate group. They are the building blocks of DNA and RNA. The empirical formula of nucleic acids is C5H4O2N3P. They contain nitrogen, phosphorus, carbon, oxygen, and hydrogen. They do not have the empirical formula CHO.
Proteins are macromolecules composed of amino acids. They have a complex structure. Proteins are composed of carbon, hydrogen, oxygen, and nitrogen. Some proteins also contain sulfur and phosphorus. Therefore, they do not have the empirical formula CHO. Thus, out of the given options, none of the following have the empirical formula CHO.
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Under what conditions would pressure affect the reaction rate?
A. If the reaction requires the use of a catalyst
B. If the reaction takes place between a solid and a liquid
O c. If the reaction is between two liquids
D. If the reaction occurs in the gas phase
Answer: D. If the reaction occurs in the gas phase
Explanation:
Answer:
D is correct via A P e x
Explanation:
6
What is the density of a substance that has a mass of 2.0 g, and when placed in a graduated cylinder
the volume changed from 70 mL to 75 mL?
A 2.5 g/mL
B 7.0 g/mL
C 10. g/mL
D 0.40 g/mL
The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)
How do I determine the density of the substance?First, we shall obtain the volume of the substance. This can be obtained as follow:
Volume of water = 70 mL Volume of water + substance = 75 mL Volume of substance =?Volume of substance = (Volume of water + substance) - (Volume of water)
Volume of substance = 75 - 70
Volume of substance = 5 mL
Finally, we shall determine the density of the substance. This is illustrated below:
Mass of substance = 2.0 gVolume of substance = 5 mLDensity of substance = ?Density = mass / volume
Density of substance = 2 / 5
Density of substance = 0.4 g/mL
Thus, the density is 0.4 g/mL (Option D)
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what is the smallest identifiable unit of a compound
Answer:
The smallest identifiable unit of a compound is an element, which is made up of atoms which are chemically bonded.
The smallest identifiable unit of a compound is mole per liter and can be represent in the form of molarity.
What is molarity?Molarity is the number of moles of the substance or the compound present in per liter of water this compound can also be known as the solute and it is the unit which is identifiable.
Molarity can be calculated which is equal to the number of moles divided by volume of the solution in liters and it can be affected by temperature also unit will be moles per liter.
Therefore, smallest identifiable unit of a compound is mole per liter and can be represent in the form of molarity.
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which intermolecular forces are exhibited between molecules of the compound shown? select all that apply. multiple select question. hydrogen bonding covalent bonds dipole-dipole forces dispersion forces
The intermolecular forces exhibited between molecules of the compound shown are hydrogen bonding, dipole-dipole forces, and dispersion forces.
1. Hydrogen bonding: This force occurs when a hydrogen atom is bonded to a highly electronegative atom (like nitrogen, oxygen, or fluorine) in one molecule and is attracted to a highly electronegative atom in another molecule. If the compound has these features, hydrogen bonding will be present.
2. Dipole-dipole forces: These forces occur between polar molecules that have a positive and a negative end (dipole). If the compound has polar bonds and an asymmetrical structure, it will exhibit dipole-dipole forces.
3. Dispersion forces: Also known as London dispersion forces or van der Waals forces, these are weak intermolecular forces that arise from temporary fluctuations in electron distribution. Dispersion forces are present in all molecules, whether polar or nonpolar.
Note that covalent bonds are not an intermolecular force, as they involve the sharing of electrons between atoms within a single molecule.
Based on the given options, the compound exhibits hydrogen bonding, dipole-dipole forces, and dispersion forces as intermolecular forces between its molecules.
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how heart attacks and Strokes caused by cholesterol
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Answer:
Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease.
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Explanation:
High cholesterol can cause a dangerous accumulation of cholesterol and other deposits on the walls of your arteries (atherosclerosis). These deposits (plaques) can reduce blood flow through your arteries, which can cause complications, such as:
Chest pain. If the arteries that supply your heart with blood (coronary arteries) are affected, you might have chest pain (angina) and other symptoms of coronary artery disease.
Heart attack. If plaques tear or rupture, a blood clot can form at the plaque-rupture site — blocking the flow of blood or breaking free and plugging an artery downstream. If blood flow to part of your heart stops, you'll have a heart attack.
Stroke. Similar to a heart attack, a stroke occurs when a blood clot blocks blood flow to part of your brain.
define open and closed circuit
Answer:
An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout. A device designed to open or close a circuit under controlled conditions is called a switch.
What quantity of copper is deposited by the same quantity of electricity that deposited 9g of aluminum
Answer:
Mass of copper deposited = 31.75 g
Explanation:
According to Faraday's second law of electrolysis, when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements deposited are inversely proportional to the charges on the ions of the elements.
From this law, it can be seen that the higher the charge, the lower the number of moles of a given element deposited.
Number of moles of aluminium in 9 g of aluminium = mass / molar mass
Molar mass of aluminium = 27 g
Number of moles of aluminium = 9/27 = 1/3 moles
Charge on aluminium ion = +3
3 moles of electrons will discharge 1 mole of aluminium,
1 mole of electrons will discharge 1/3 moles of aluminium
Number of moles of electrons involved = 1 mole of electrons
Charge on copper ion = +2
1 mole of electrons will discharge 1/2 moles of copper.
Mass of 1/2 moles of copper = number of moles × molar mass of copper
Molar mass of copper = 63.5 g
Mass of copper deposited = 1/2 × 63.5 = 31.75 g
Multimeters are used to test the conductivity of a substance. What is most likely the identity of the liquid?
Answer:
The purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then comparing the results to the values for the known substance. Hope this helps!! :)
What is the purpose of a catalyst in the production of hydrogen?
Select the correct answer.
- to increase the rate at which water molecules decompose
- to decrease the amount of oxygen produced
- to decrease the temperature of the reaction
- to increase the activation energy of the reaction
The purpose of a catalyst in the production of hydrogen is to increase the rate at which water molecules decompose.
What is a catalyst-A catalyst is a substance that increases the rate of a chemical reaction without itself being consumed or produced during the reaction. As a result, catalysts assist in speeding up chemical reactions while also decreasing the amount of energy needed for the reaction to occur. In hydrogen production, catalysts are used to speed up the decomposition of water into hydrogen and oxygen. The use of catalysts lowers the activation energy required for the reaction to occur, resulting in a faster reaction rate and lower operating temperatures.What is the process of hydrogen production?Hydrogen production has various methods, and one of the most commonly used methods is water electrolysis. In this method, water molecules are split into hydrogen and oxygen using an electric current passed through an electrode. Water is broken down into hydrogen and oxygen during the process, with the assistance of a catalyst. During this process, a catalyst like platinum or nickel is employed to speed up the chemical reaction of water decomposition.
When an electric current is applied to the catalyst, water molecules are broken apart, releasing hydrogen and oxygen atoms.Catalysts lower the activation energy of the reaction, allowing it to occur faster than it would otherwise. In hydrogen production, catalysts are crucial since they enable the reaction to occur at a lower temperature, reducing energy consumption and minimizing operating costs. As a result, the use of catalysts is essential to the production of hydrogen.
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A/n ____ replacement is when a metal replaces a metal in a single replacement chemical reaction.
Select one:
a.
acid
b.
anion
c.
cation
d.
base
anion
the reaction is called single displacement whereby an element is substituted by another in a compound
A cation replacement is when a metal replaces a metal in a single replacement chemical reaction.
What is chemical reaction?
Chemical reactions 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 reaction.
There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical reactions:
1) inorganic reactions
2)organic reactions
3) biochemical reactions
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Important marine autotrophs that have silica incorporated into their cell walls are: a. coccolithophorids. b. dinoflagellates.c. radiolarians.d. diatoms.
The autotrophs that have silica incorporated into their cell walls are diatoms. Option(D)
Diatoms are a type of microalgae found in both freshwater and marine environments. They have a unique external skeleton called a frustule, which is composed of silica.
The frustule provides structural support and protection to the diatom cell. Coccolithophorids, dinoflagellates, and radiolarians are other types of marine microorganisms but do not have silica in their cell walls.
Autotrophs are organisms capable of producing their own food using energy from sunlight (photosynthesis) or inorganic chemicals (chemosynthesis). They convert raw materials into organic compounds, serving as the primary producers in ecosystems.
Coccolithophorids are a group of single-celled algae found in marine environments. They are characterized by tiny calcified plates called coccoliths that cover their cell surface. These coccoliths play a role in carbon cycling and are significant contributors to marine sediment and biogeochemical processes.
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what is the relationship between temperature and pressure pls
Answer:
When the temperature of a system goes up, the pressure also goes up, and vice versa. The relationship between pressure and temperature of a gas is stated by the Gay-Lussac's law.
Answer:
We find that temperature and pressure are linearly related, and if the temperature is on the kelvin scale, then P and T are directly proportional (again, when volume and moles of gas are held constant); if the temperature on the kelvin scale increases by a certain factor, the gas pressure increases by the same factor.
how do anion formation and valence electrons relate?
Answer:
A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.
Answer:
A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.
Explanation:
Hope I helped!
what is the hybridization of the central atom in each of the following? 1. [ select ] beryllium chloride 2. [ select ] nitrogen dioxide 3. [ select ] carbon tetrachloride 4. [ select ] xenon tetrafluoride
The hybridization of the central atom in each of the following is :
Beryllium chloride : Be is sp hybridized
Nitrogen dioxide : N atom is sp² hybridized
Carbon tetrachloride : C is sp³ hybridized
Xenon tetrafluoride : Xe is sp³d² hybridized.
The Beryllium chloride hybridization : The central atom is Be and is sp hybridized.
The Nitrogen dioxide hybridization : the central atom is N and N atom is sp² hybridized
The Carbon tetrachloride : C is sp³ hybridized. The Xenon tetrafluoride : Xe is sp³d² hybridized.
Thus, The hybridization of the central atom in each of the following is :
Beryllium chloride : Be atom is sp hybridized
Nitrogen dioxide : N atom is sp² hybridized
Carbon tetrachloride : C is sp³ hybridized
Xenon tetrafluoride : Xe is sp³d² hybridized.
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When Michelle's blood was tested, the chloride level was 0.55 g/dL. Part A What is this value in milliequivalents per liter? Express your answer in milliequivalents per liter to two significant figures. IVAL OO? mEq/L S
The given chloride level in Michelle's blood is 0.55 g/dL. Now we need to convert this value into milliequivalents per liter.
Chloride has a molar mass of 35.45 g/mol. The equation for calculating milliequivalents per liter is:milliequivalents per liter (mEq/L) = (mass in g / molar mass) x 10So, milliequivalents per liter (mEq/L) of Michelle's blood is:0.55 g/dL = 0.55 x 10 / 35.45 mEq/L (since 1 dL = 1000 mL)0.55 x 10 / 35.45 ≈ 0.1561 (rounded to four significant figures)So, the value of chloride level in milliequivalents per liter in Michelle's blood is approximately 0.1561 mEq/L (to two significant figures, the answer is 0.16 mEq/L).Thus, the correct answer is IVAL 0.16 mEq/L.
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Some students believe that teachers are full of hot air. If I inhale 3.5 liters of gas at a temperature of 190 C and it heats to a temperature of 580 C in my lungs, what is the new volume of the gas
The new volume of the gas in your lungs would be approximately 6.44 liters. The new pressure of the gas would be approximately 2.69 atm. There are approximately 0.218 moles of gas present. The initial volume of the gas would be approximately 16.21 liters.
Let's address each question separately:
Inhaling gas:
To determine the new volume of the gas, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature, assuming constant pressure.
Charles's Law equation: V(i)/T(i) = V(f)/T(f)
Solving for V(f):
V(f) = (V(i) × T(f)) / T(i)
V(f) = (3.5 liters × 853 K) / 463 K
V(f) ≈ 6.44 liters
Therefore, the new volume of the gas in your lungs would be approximately 6.44 liters.
Compressing gas:
Since the temperature stays the same, we can use Boyle's Law,
Boyle's Law equation: P(i) × V(i) = P(f) × V(f)
Solving for P(f):
P(f) = (P(i) × V(i)) / V(f)
P(f) = (1 atm × 1.50 liters) / 0.556 liters
P(f) ≈ 2.69 atm
Therefore, the new pressure of the gas would be approximately 2.69 atm.
Inflating potato chip bag:
Similar to question 1, we can use Charles's Law to determine the new volume of the bag.
Charles's Law equation: V(i)/T(i) = V(f)/T(f)
Solving for V(f):
V(f) = (V(i) × T(f)) / T(i)
V(f) = (125 mL × 573 K) / 294 K
V(f) ≈ 243 mL
Therefore, the new volume of the bag would be approximately 243 mL.
Gas at changing pressure, temperature, and volume:
To solve this problem, we can use the combined gas law, which relates the initial and final conditions of pressure, temperature, and volume of a gas.
Combined gas law equation: (P(i) × V(i)) / T(i) = (P(f) × V(f)) / T(f)
Solving for Vi:
V(i) = (P(i) × V(i) × T(f)) / (P(f) × T(i))
V(i) = (1.5 atm × 34 liters × 300 K) / (1.9 atm × 315 K)
V(i) ≈ 16.21 liters
Therefore, the initial volume of the gas would be approximately 16.21 liters.
Size of a bubble:
To find the size of the bubble, we can apply Boyle's Law, which relates the initial and final pressures and volumes of a gas.
Boyle's Law equation: P(i) × V(i) = P(f) × V(f)
Solving for V(f):
V(f) = (P(i) × V(i)) / P(f)
V(f) = (1.5 atm × 17,000 liters) / 245 atm
V(f) ≈ 104.08 liters
Therefore, the size of the bubble would be approximately 104.08 liters.
Moles of gas:
To calculate the number of moles of gas, we can use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.
Ideal gas law equation: PV = nRT
Solving for n (number of moles):
n = PV / RT
n = (2.4 atm × 8.5 liters) / (0.0821 atm·L/(mol·K) × 395 K)
n ≈ 0.218 moles
Therefore, there are approximately 0.218 moles of gas present.
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--The question is incomplete, the complete question is given:
"Some students believe that teachers are full of hot air. If I inhale 3.5 liters of gas at a temperature of 190 C and it heats to a temperature of 580 C in my lungs, what is the new volume of the gas? If 1.50 L of a gas is at standard temperature and pressure is compressed to 556 mL, what is the new pressure of the gas in atm (hint, temperature stays the same)? On hot days, you may have noticed that potato chip bags seem to “inflate”, even though they have not been opened. If I have a 125 mL bag at a temperature of 21 0C, and I leave it in my car with a temperature of 300 C, what will the new volume, in mL, of the bag be? I have an unknown volume of gas at a pressure of 1.5 atm and a temperature of 315 K. If I raise the pressure to 1.9 atm, decrease the temperature to 300 K, and measure the final volume to be 34 liters, what was the initial volume of the gas? Submarines need to be extremely strong to withstand the extremely high pressure of water pushing down on them. An experimental research submarine with a volume of 17,000 liters has an internal pressure of 1.5 atm. If the pressure of the ocean breaks the submarine forming a bubble with a pressure of 245 atm pushing on it, how big will that bubble be in liters? If I have an unknown quantity of gas held at a temperature of 395 K in a container with a volume of 8.5 liters and a pressure of 2.4 atm, how many moles of gas are present?"--
Explanation:
Those are crazy , ridiculous numbers (as I commented )
P1V1/T1 = P2V2/T2 Where 'T' is in Kelvin
I will assume P is constant..
(...so you don't blow out your lungs in a bloody burnt mess )
V1/T1 = V2/T2 <=====RE ARRANGE TO :
V2 = V1/T1 * T2 PLUG IN THE NUMBERS
V2 = 3.5 / ( 273.15 + 190) * ( 273.15 + 580) = 6 .45 liters
A reaction 3A 4B occurs in which order conforms to stoichiometry. If ki is defined with respect to B, which of the following rate expressions is correct? La=-kC? IB=kiC64 IB=+(4/3ra TA = -(4/3)kiC3 None of the above.
None of the provided rate expressions is correct. The correct rate expression for the given reaction, where ki is defined with respect to B, is r = kA[A]^3[IB]^4.
The stoichiometry of the reaction is given as 3A + 4B. Let's assume the rate of reaction as r, and the rate constants as kA and kB for the reactants A and B, respectively.
Based on the stoichiometry, the rate expression can be written as follows:
r = kA[A]^3[B]^4
Since ki is defined with respect to B, we can substitute kB with ki in the rate expression:
r = kA[A]^3[IB]^4
However, none of the given rate expressions in the options match this form. Let's analyze each option:
Option 1: La = -kC
This expression does not account for the stoichiometry of the reaction, as it only includes a single reactant C. It does not include terms for A or B, nor does it consider the stoichiometric coefficients.
Option 2: IB = kiC^64
This expression contains an incorrect stoichiometric coefficient for C (C^64). Additionally, it does not consider the stoichiometry of the reaction involving A.
Option 3: IB = +(4/3)ra TA = -(4/3)kiC^3
This expression contains an incorrect stoichiometric coefficient for C (C^3). Additionally, it introduces additional terms (ra and TA) that are not part of the rate expression based on the given stoichiometry.
None of the provided rate expressions is correct. The correct rate expression for the given reaction, where ki is defined with respect to B, is r = kA[A]^3[IB]^4.
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Balancee las ecuaciones químicas por el método de tanteo e identifique que tipo de reacción es: 1.1.- Cloruro férrico acuoso reacciona con carbonato de sodio sólido para formar carbonato férrico sólido y cloruro de sodio acuoso.
Respuesta:
2 FeCl₃(aq) + 3 Na₂CO₃(s) ⇒ Fe₂(CO₃)₃(s) + 6 NaCl(aq)
Explicación:
Consideremos la ecuación no balanceada que ocurre cuando cloruro férrico acuoso reacciona con carbonato de sodio sólido para formar carbonato férrico sólido y cloruro de sodio acuoso. Esta es una reacción de doble desplazamiento.
FeCl₃(aq) + Na₂CO₃(s) ⇒ Fe₂(CO₃)₃(s) + NaCl(aq)
Vamos a usar el método de tanteo. Empezaremos balanceando los átomos de C, multiplicando Na₂CO₃ por 3.
FeCl₃(aq) + 3 Na₂CO₃(s) ⇒ Fe₂(CO₃)₃(s) + NaCl(aq)
Luego, balancearemos los átomos de Fe, multiplicando FeCl₃ por 2.
2 FeCl₃(aq) + 3 Na₂CO₃(s) ⇒ Fe₂(CO₃)₃(s) + NaCl(aq)
Finalmente, obtendremos la ecuación balanceada, multiplicando NaCl por 6.
2 FeCl₃(aq) + 3 Na₂CO₃(s) ⇒ Fe₂(CO₃)₃(s) + 6 NaCl(aq)
A woman walks into a carpet store wearing high-heeled shoes with a circular heel of diameter 0.987 cm. To the dismay of the store manager, she balances on one heel on an expensive carpet sample. If she has a mass of 45.5 kg, determine the pressure she exerts on the carpet sample.
The pressure she exerts on the carpet sample:-5.8279 MPa
Calculation of Pressure exerted on the carpet:-P = F/A
Where,
F= Force
A = Area
Given that;
d= 0.987 cm =0.987 x 10^-2 m
m= 45.5 kg
Area = πr^2= (π(0.987 x 10^-2)^2/2)
=7.6511 x 10^-5 square meter
Force= mg
= 45.5 x 9.8
=445.9 N
Pressure = force/ area
=445.9/7.6511 x 10^-5
=5.8279 MPa
The pressure she exerts on the carpet sample:-5.8279 MPa
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