Question

1. Vaporization of a liquid sample generates 1.23 L of a gas at a pressure of 0.975 atm and a temperature of 112 °C. The mass of the sample is 1.59 g. (R=0.08206 L·atm/mol·K)
   1. Find the molar mass of the gas (4 pts)

2. What is the molecular formula of the gas if the empirical formula is CH₂?

(C=12.01 g/mol, H=1.01 g/mol) (3 pts)

3. Find the number of moles of the gas produced (3 pts)

4. This gas is mixed with 0.063 moles of another gas (named as A) in a different container. The volume of the container is 1.85 L and the temperature is increased to 130. °C. Find the partial pressures of both gases and the total pressure of the mixture. (6 pts)

Answer 1

1.