1,722 Answered Questions for the topic biochemistry

10/09/20

Redox Terminology question
You add sulfuric acid into CuO, turning the solution into a blue color.In the next step, you add Zn(s) to the blue solution. What is the purpose of adding Zn(s) in this step? Explain by using... more
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10/08/20

Molecular and Net Ionic Equation
What is the type of reaction when sulfuric acid is added to the black CuO(s)?Write a molecular equation and a net ionic equation for the reaction to support your answer.What are the spectator ions?
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10/08/20

Calculate the mass of the polystyrene sample.
A sample of polystyrene, which has a specific heat capacity of 1.880 J*g^-1 * C^-1, is put into a calorimeter that contains 300.0 g of water. The polystyrene sample starts off at 88.6 C and the... more
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Biochemistry Science Biology Chemistry

10/08/20

Can someone help me please?
A 45 year-old woman complaining of breast pain was diagnosed with having HER2-positive breast cancer. The patient underwent lumpectomy followed by a period of chemotherapy including adjuvant... more
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Biochemistry Science Biology Chemistry

10/08/20

Can someone help me please?
A 45 year-old woman complaining of breast pain was diagnosed with having HER2-positive breast cancer. The patient underwent lumpectomy followed by a period of chemotherapy including adjuvant... more
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Biochemistry

10/07/20

Need Help, Thank you
1.      Describe the structure of the mitochondria, including the location of ATP synthase, high proton concentration, the citric acid cycle, and β-oxidation.  2.      What do... more
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10/07/20

Calculate the initial temperature of the iron sample.

A 57.2 sample of iron, which has a specific heat capacity of 0.449 J * g^-1 *C^-1 , is put into a calorimeter that contains 150.0 g of water. The temperature of the water starts off at 20.0 C. When... more
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10/07/20

Calculate the new temperature of the water bath.

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 9.90kgof water at 38.0°C. During the reaction 140.kJ of heat flows out of the flask and into the... more
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10/06/20

What is the heat of combustion for cyclohexane in kJ/ mol of cyclohexane
A 4.25 g sample of cyclohexane (C6H12, MM= 84g/mol) is combusted in a bomb calorimeter with a total heat capacity of 5.86 kJ/ ºC. The temperature of the calorimeter increases from 23.5 ºC to 39.8... more
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10/06/20

By how much will the temperature of the calorimeter increase if the combustion of a certain sample of cyclohexane releases 9892 J of heat?
The heat capacity of a bomb calorimeter is .By how much will the temperature of the calorimeter increase if the combustion of a certain sample of cyclohexane releases 9892 J of heat?
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10/06/20

What will be the final temperature of the Aluminum bar and of the water once thermal equilibrium is achieved ?

A 10.0 g bar of aluminum initially at  is placed in 100.mL of water initially at  . What will be the final temperature of the Aluminum bar and of the water once thermal equilibrium is achieved ?... more
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10/06/20

Calculate the heat gained by the water if the final equilibrium temperature is 57.8 °C.

A 1.5 g iron nail is heated to 95.0 °C and placed into a beaker of water. Calculate the heat gained by the water if the final equilibrium temperature is 57.8 °C. The specific heat of iron = 0.449... more
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10/06/20

Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.
Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.Assume the specific heat capacity of ethanol under these conditions is ·2.44J·g−1K−1.Be sure your answer has the correct... more
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10/06/20

What is the final temperature of 10.0g of water initially at C after absorption of 100.J of heat?

What is the final temperature of 10.0g of water initially at C after absorption of 100.J of heat? The specific heat of water is 4.184 J/g C.
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10/06/20

Calculate the energy required to heat 701.0mg of silver from −0.8°C to 8.9°C.

Calculate the energy required to heat 701.0mg of silver from −0.8°C to 8.9°C. Assume the specific heat capacity of silver under these conditions is ·0.235J·g−1K−1.Be sure your answer has the... more
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10/06/20

What can the chemist report for the specific heat capacity of the substance?
Hello, I'm so confused on this question, can I please have a detailed explanation?A chemist carefully measures the amount of heat needed to raise the temperature of a 261.0mg sample of a pure... more
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10/06/20

What can the chemist report for the specific heat capacity of the substance?

A chemist carefully measures the amount of heat needed to raise the temperature of a 261.0mg sample of a pure substance from 2.8°C to 19.5°C. The experiment shows that 0.606J of heat are needed.... more
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10/06/20

What can the chemist report for the specific heat capacity of the substance?
A chemist carefully measures the amount of heat needed to raise the temperature of a 754.0g sample of a pure substance from 2.1°C to 20.2°C. The experiment shows that 9.69kJ of heat are... more
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10/06/20

What can the chemist report for the specific heat capacity of the substance?
A chemist carefully measures the amount of heat needed to raise the temperature of a 442.0mgsample of a pure substance from 52.4°C to 66.4°C. The experiment shows that 25.9J of heat are needed.What... more
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10/05/20

URGENT!!! What can the chemist report for the specific heat capacity of the substance?

A chemist carefully measures the amount of heat needed to raise the temperature of a 697.0g sample of a pure substance from 59.9°C to 67.2°C. The experiment shows that 21.kJ of heat are needed.... more
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10/01/20

Urgent: Calculate the minimum mass of hydrobromic acid that could be left over by the chemical reaction.

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O.Suppose 45. g of hydrobromic acid is mixed with 16.6 g of sodium... more
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09/30/20

Calculate the largest amount of H2O that could be produced.
Hydrogen (H2) gas and oxygen (O2) gas react to form water H2O vapor. Suppose you have 1.0 mol of H2 and 5.0 mol of O2 in a reactor.Calculate the largest amount of H2O that could be produced.Round... more
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09/29/20

What is the density of the iron nugget?
An iron nugget weighing 8.14 g was placed in a graduated cylinder and 25.1 cm3 of water was added to the cylinder. The total volume after adding the water was 26.2 cm3.What is the density of the... more
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09/29/20

Which is more stable, cis or trans?
Which is more stable out of these stereoisomers?(a) cis-1,2-dimethylcyclopentane(b) trans-1,2-dimethylcyclopentane
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09/29/20

Hydrogen (H2) gas and oxygen (O2) gas react to form water (H2O) vapor. 
Hydrogen (H2) gas and oxygen (O2) gas react to form water (H2O) vapor. Suppose you have 5.0 mol of (H2) and 11.0 mol of (O2) in a reactor.Suppose as much as possible of the H2 reacts. How much will... more
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