1,698 Answered Questions for the topic biochemistry

09/21/20

When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?
When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?a. Doubling the amount of... more
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09/21/20

need help with a homework problem, very advanced
Guanine is an essential component of DNA. It contains the elements carbon, hydrogen,nitrogen and oxygen. When 615 mg of guanine is burned, 895 mg of carbon dioxide and 183 mgof water are formed. In... more
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09/21/20

why do you assume 100 g of a substance when given percentages?
when given a problem and the elements of a compound are given in percentages, i don't understand why you can just assume that it's 100g of the compound. why couldn't it be 200g or 700g of the... more
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09/20/20

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.
When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.What is the enthalpy of solution of ammonium nitrate? Given, specific heat of solution... more
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09/20/20

Given the following salts and the corresponding enthalpy, predict whether the temperature will decrease or increase when the salt dissolves in water.
Given the following salts and the corresponding enthalpy, predict whether the temperature will decrease or increase when the salt dissolves in water.Ammonium Chloride (ΔHsol = +14.7 kJ/mol)
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09/20/20

Calculate the amount of salt in a commercial cold-pack containing ammonium nitrate (ΔHsol = + 25.7 kJ/mol) if the final temperature of the cold-pack is 0ºC.
Calculate the amount of salt in a commercial cold-pack containing ammonium nitrate (ΔHsol = + 25.7 kJ/mol) if the final temperature of the cold-pack is 0ºC. Assume that the initial temperature of... more
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09/20/20

When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?
When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?a. Doubling the amount of... more
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09/20/20

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC. What is the enthalpy of solution of ammonium nitrate? Given, specific heat of solution... more
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09/20/20

What is the amount of ammonia (17.03 g/mol) that can be obtained by complete reaction of 35 g of nitrogen gas (28.01 g/mol) with excess hydrogen gas
What is the amount of ammonia (17.03 g/mol) that can be obtained by complete reaction of 35 g of nitrogen gas (28.01 g/mol) with excess hydrogen gasaccording to the balanced equation:N2 + 3H2 = 2NH3
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09/20/20

What is the concentration expressed in ppm of a solution containing 0.036 g of sodium chloride (58.44g/mol) in 0.500 Liters of solution ? Assume the density of the solution to be 1.00g/mL.
What is the concentration expressed in ppm of a solution containing 0.036 g of sodium chloride (58.44g/mol) in 0.500 Liters of solution ? Assume the density of the solution to be 1.00g/mL.
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09/20/20

What volume of a 0.500 M solution of sucrose (342.3 g/mol) contains 22.4 g of sucrose?
What volume of a 0.500 M solution of sucrose (342.3 g/mol) contains 22.4 g of sucrose?
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09/20/20

What is the molarity (M)of a sodium chloride solution prepared by dissolving 20.0 g of sodium chloride (58.44g/mol) in water to give 45 mL of solution?
What is the molarity (M)of a sodium chloride solution prepared by dissolving 20.0 g of sodium chloride (58.44g/mol) in water to give 45 mL of solution?
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Biochemistry Math Science Calculus

09/18/20

Write the prefix and unit that is represented by each of the following sets of symbols
1.Write the prefix and unit that is represented by each of the following sets of symbols -mm-pL-dL-µs-km-m-ng2.Write the symbols that represent each combination of prefix and... more
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Biochemistry Math Science Chemistry

09/18/20

Write which prefix is associated with the following place values:
Write which prefix is associated with the following place values:-The hundreds place-The millions place-The tenths place-The hundredths place-The billionths place-The billions place-The thousandths... more
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09/18/20

Write the symbols that represent each prefix.
Write the symbols that represent each prefix.-Deca-Pico-Hecto-Milli-Kilo-Mega-Micro-Centi
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09/17/20

Calculate the mass of ammonia NH3 that contains a million 1.0 x 10^6 hydrogen atoms.
Calculate the mass of ammonia NH3 that contains a million 1.0 x 10^6 hydrogen atoms.Be sure your answer has a unit symbol if necessary, and round it to 2 significant digits.
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09/17/20

Calculate the mass of glucose C6H12O6 that contains a trillion 1.000 x 10^12 carbon atoms.
Calculate the mass of glucose C6H12O6 that contains a trillion 1.000 x 10^12 carbon atoms.Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
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09/17/20

Calculate the number of hydrogen atoms in a 100.0 g sample of tetraborane (B4H10)
Calculate the number of hydrogen atoms in a 100.0 g sample of tetraborane (B4H10).Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
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09/16/20

What is the minimum mass of magnetite Fe3O4, a iron ore, from which 7.5kg of pure iron could be extracted?
What is the minimum mass of magnetite Fe3O4, a iron ore, from which 7.5kg of pure iron could be extracted?Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number... more
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09/16/20

Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.
Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.Suppose a... more
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09/16/20

What is the maximum mass of pure gold that could be extracted from 150.g of calaverite, a gold ore with the chemical formula AuTe2
What is the maximum mass of pure gold that could be extracted from 150.g of calaverite, a gold ore with the chemical formula AuTe2Be sure your answer has a unit symbol, if necessary, and is rounded... more
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09/16/20

Calculate the mass of hydrazine (N2H4) that contains a trillion (1.000 * 10^12) hydrogen atoms:
Calculate the mass of hydrazine (N2H4) that contains a trillion (1.000 * 10^12) hydrogen atoms.Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
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Biochemistry Biology Organic Chemistry

09/09/20

Is there an enzyme that functions without being associated with a complex?
I'm looking for an enzyme that does not function as part of a complex in its active state. Preferably it also is not part of a kinase or other kind of activating cascade as well though I would... more
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Biochemistry Biophysics

09/03/20

Are chromosomes soluble when they are condensed?
DNA is soluble, but are chromosomes still dissolved in the aqueous phase when they are condensed during cell division?
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Biochemistry Math Science Biology

08/30/20

Label The diagram A ⮂ B+C

A ⮂ B+Ca. Reactant (substrate) for hydrolysisb. Products of hydrolysisc. Reactants for synthesisd. Product of synthesis
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