A gaseous compound is 7826 boron and 2174 hydrogen by mass A 0600 g sample of

A gaseous compound is 7826 boron and 2174 hydrogen by

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112.A gaseous compound is 78.26% boron and 21.74% hydrogen by mass. A 0.600-g sample of it occupies487 mL at STP. What is the molecular formula for the gas? a.BH3b.B2H6c.B3H9d.B2H4e.B3H6ANS: BOBJ:Apply the ideal gas law and percent composition to determine the identity of a gas.TOP:Determinations of Molecular Weights and Molecular Formulas of Gaseous Substances113.A gas consists of 14.9% P and 85.1% Cl. A 2.184 g sample of this gas occupies 500 mL at 460 torr and78C. What is the molecular formula?a.PClb.P2Cl10c.PCl3d.PCl5e.PCl4ANS: DOBJ:Apply the ideal gas law and percent composition to determine the identity of a gas.TOP:Determinations of Molecular Weights and Molecular Formulas of Gaseous SubstancesWhitten 10eTest Bank
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 Whitten 10e Test Bank
118.A 10.0-L flask contains 0.400 mole of H2, 0.300 mole of He and 0.500 mole of Ne at 35.0C. What is

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