1,698 Answered Questions for the topic biochemistry

Biochemistry Science Biology Chemistry

10/12/20

Can someone tell me how I should answer this question?
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
Follows • 1
Expert Answers •1

10/12/20

Organic Chemistry - ALKANES

Industrial preparation of alkanes involves:a)   fractional distillation  c) alkylationb)   polymerization          d) all of the abovE
Follows • 1
Expert Answers •1

10/11/20

How many mL of stomach acid would be neutralized by the antacid?
If 1.95 x 10-3 mols of stomach acid is neutralized by the antacid, and the concentration of stomach acid is 0.155 M, how many mL of stomach acid would be neutralized by the antacid?a. 13.4 mLb.... more
Follows • 2
Expert Answers •1

10/11/20

Calculate the heat?
A gas tank in a home barbeque contains 13.2 kg of propane, C3H8, (44.1 g/mol). Calculate the heat (in kJ) associated with the complete combustion of all of the propane in the tank given the... more
Follows • 1
Expert Answers •1

10/10/20

Is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0 or <0?
Consider a gas enclosed in a cylinder with a piston. If the gas is compressed by lowering the piston, is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0... more
Follows • 2
Expert Answers •2

10/10/20

Which of the following has a negative value of ΔH?
Which of the following has a negative value of ΔH?a. The melting of snowb. The evaporation of ethanolc. The combustion of gasolined. The dissolution of ammonium nitrate in a cold pack
Follows • 1
Expert Answers •1

10/10/20

Calculate the change in internal energy, ΔU, for a system that does 422 J of work and loses 227 J of energy as heat
Calculate the change in internal energy, ΔU, for a system that does 422 J of work and loses 227 J of energy as heat.
Follows • 2
Expert Answers •1

10/10/20

Calculate the equilibrium temperature of the coffee.
14.0g of cream at 11.5°C are added to an insulated cup containing 150.0g of coffee at 84.6°C. Calculate the equilibrium temperature of the coffee.You may assume no heat is lost to the cup or... more
Follows • 2
Expert Answers •1

10/10/20

Calculate the equilibrium temperature of the water.
A 47.0g sample of brass, which has a specific heat capacity of 0.375·J·g−1°C−1, is dropped into an insulated container containing 300.0g of water at 15.0°C and a constant pressure of 1atm. The... more
Follows • 2
Expert Answers •2

10/10/20

Urgent: How many mols of HCl remained after neutralization by the antacid?
25.00 mL of 1.034 M HCl was reacted with an antacid tablet and the remaining HCl was titrated with 1.068 M NaOH. If the volume of NaOH at the end point of the titration was 18.50 mL, how many mols... more
Follows • 1
Expert Answers •1

10/09/20

Calculate the equilibrium temperature of the water.
A 46.0g sample of aluminum, which has a specific heat capacity of 0.897·J·g−1°C−1, is dropped into an insulated container containing 100.0g of water at 60.0°C and a constant pressure of 1atm. The... more
Follows • 2
Expert Answers •1

10/09/20

Calculate the specific heat capacity of quartz according to this experiment.

A 52.3 g sample of quartz is put into a calorimeter that contains 150.0 g of water. The quartz sample starts off at 95.3 C and the temperature of the water starts off at 25.0 C. When the... more
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •1

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?
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •1
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
Follows • 1
Expert Answers •1
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
Follows • 1
Expert Answers •1

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
Follows • 2
Expert Answers •2

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
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •1

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?
Follows • 2
Expert Answers •2

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
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •1

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.
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.