114.A gaseous compound containing only nitrogen and oxygen is 63.64% N and 36.36% O by weight. At standard conditions 196 mL of the gas weighs 0.385 grams. What is the molecular formula of the gas?
115.A gaseous compound is 52.14% C, 13.13% H and 34.73% O by mass. At STP 325 mL of the gas weighs 0.668 g. What is the molecular formula for this compound?
116.A 2.08-gram sample of a gaseous compound contains 1.92 grams of carbon and 0.16 gram of hydrogen. At STP, the same sample occupies a volume of 1793 mL. What is the molecular formula for the compound?
117.A 0.580-g sample of a compound containing only carbon and hydrogen contains 0.480 g of carbon and0.100 g of hydrogen. At STP 33.6 mL of the gas has a mass of 0.087 g. What is the molecular formula for the compound?
a.CH3b.C2H6c.C2H5d.C4H10e.C4H12ANS: DOBJ:Apply the ideal gas law and composition data to determine the identity of a gas.TOP:Determinations of Molecular Weights and Molecular Formulas of Gaseous Substances