Name: Chem1225 Homework 3 (R=0.08206Latm/molK) 1. A mass of 1.37g of an unknown gas, composed of only carbon and hydrogen, is introduced into an evacuated 1.70L flask. If the pressure in the flask is 0.814 atm at 98C, what is the molar mass of the gas in the flask? What might be the molecular formula of this gas? 2. Sodium peroxide (Na2O2) is used to remove carbon dioxide from (and add oxygen to) the air supply in spacecrafts. It works by reacting with CO2 in the air to produce sodium carbonate (Na2CO3) and O2. 2Na2O2(s)+2CO2(g)2Na2CO3(s)+O2(g) What volume of CO2 (at 20C and 1atm ) will react with a kilogram of Na2O2