Physical Chemistry Answers

Pure and dry nitrogen gas is slowly bubbled through a solution of 2.25 g of a non- volatile organic compound dissolved in 150g of benzene and then bubbled through pure benzene. The solution is found to be 2.1540g lighter, while pure benzene suffered a loss in weight of 0.0160 g. Calculate the molecular weight of non-volatile organic compound.

Hydrogen electrode and normal calomel electrode, when immersed in a solution at 25c stowed a potential of 0.664v. Calculate pH of the solution

A sample of oxygen gas is collected over water at 25°C where the vapor pressure at this

temperature is 23.8 mmHg. The wet gas occupies a volume of 7.28 L at a total pressure

of 1.25 bar. If all the water is removed, what volume will the dry oxygen occupied at a

pressure of 1.07 atm and a temperature of 37°C?

When methane (CH4) is burned in oxygen, carbon dioxide and water vapor are formed.

When 8.00 L of methane at 125°C and 1.00 atm is burned in an excess of oxygen, the

products are collected into a separate 10.0 L flask.

(a) Write a balanced equation for the reaction.

(b) What is the total pressure of the products in the flask at 125°C?

(c) What is the partial pressure of each of the products in the flask?

If you want to transfer 10mL of water to a container without spilling it, which 2 instruments would you use?

Derivation of Gibbs free energy

To calculate the molar enthalpy of vaporisation of CCl₄ which boils at 350K.

Explain how the DEPT spectrum can aid structure determination?

Convert 80 miles to kilometers.

unknown compound consists of 33.81% C, 1.42% H, 45.05%O, and 19.72% N  by mass. A 1.505 g sample of the compound when dissolved in 50.00 ml benzene  (d=0.879g/ml), lowers the freezing point of benzene to 4.70o C. What is the  molecular formula of the compound?