Physical Chemistry Answers

Suppose 100ml of a 0.2 M ZnCl2 solution is mixed with 300ml of 0.1 KNO3. What is the pH?

What is half-wave potential? How is it related to standard reduction potential

Suppose that you are travelling in the Space Shuttle Endeavor on a journey to Mars. The atmosphere (of the vehicle) consists of 20% oxygen and 80% helium by volume. It was noticed before take off from the Kennedy Space Center that there is a small leakage which if unchecked, would lead to a continual loss of gas at a rate of 0.05 atm/day through effusion. If the temperature in the space shuttle is maintained at 22°C and the volume of the vehicle is 15,000 liters. Calculate the amounts of helium and oxygen in grams that must be stored on a 5-day journey to allow for the leakage.

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further

1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCI (g) (c). What are the partial pressure of the components

and the total pressure of the system at the final stage. The temperature being 25°C throughout.

Explain the process of steam distillation

A 74.8 g sample of a metal at 143.2 °C is added to an insulated vessel containing

208g of water at 24.8 °C. The final temperature of the mixture is 31.1 °C. What is

the specific heat of the metal in J/g-°C?

When potassium dichromate (K2CrO4) is added to a solution containing 0.500g silver nitrate (AgNO3) solid silver chromate (Ag2CrO4) is formed

"The smallest bone in the human body, which is in the ear, has a mass of 0.0030 g. what is the mass of this bone in pounds?"

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further 1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCl (g) (c). What are the partial pressure of the components and the total pressure of the system at the final stage. The temperature being 25oC throughout.

6. Suppose that you are travelling in the Space Shuttle Endeavor on a journey to Mars. The atmosphere (of the vehicle) consists of 20% oxygen and 80% helium by volume. It was noticed before take off from the Kennedy Space Center that there is a small leakage which if unchecked, would lead to a continual loss of gas at a rate of 0.05 atm/day through effusion. If the temperature in the space shuttle is maintained at 22oC and the volume of the vehicle is 15,000 liters. Calculate the amounts of helium and oxygen in grams that must be stored on a 5-day journey to allow for the leakage.