In a certain experiment, magnesium boride (Mg₃B₂) reactedwith acid to form a mixture of four boron hydrides (BₓHᵧ), threeas liquids (labeled I, II, and III) and one as a gas (IV).(a) When a 0.1000-g sample of each liquid was transferred to anevacuated 750.0-mL container and volatilized at 70.00C, sam-ple I had a pressure of 0.05951 atm; sample II, 0.07045 atm; and sample III, 0.05767 atm. What is the molar mass of each liquid?(b) Boron is 85.63% by mass in sample I, 81.10% in II, and 82.98% in III. What is the molecular formula of each sample?(c) Sample IV was found to be 78.14% boron. Its rate of effusion was compared to that of sulfur dioxide and under identicalconditions, 350.0 mL of sample IV effused in 12.00 min and250.0 mL of sulfur dioxide effused in 13.04 min. What is the mo-lecular formula of sample IV?
In a certain experiment, magnesium boride (Mg₃B₂) reactedwith acid to form a mixture of four boron hydrides (BₓHᵧ), threeas liquids (labeled I, II, and III) and one as a gas (IV).(a) When a 0.1000-g sample of each liquid was transferred to anevacuated 750.0-mL container and volatilized at 70.00C, sam-ple I had a pressure of 0.05951 atm; sample II, 0.07045 atm; and sample III, 0.05767 atm. What is the molar mass of each liquid?(b) Boron is 85.63% by mass in sample I, 81.10% in II, and 82.98% in III. What is the molecular formula of each sample?(c) Sample IV was found to be 78.14% boron. Its rate of effusion was compared to that of sulfur dioxide and under identicalconditions, 350.0 mL of sample IV effused in 12.00 min and250.0 mL of sulfur dioxide effused in 13.04 min. What is the mo-lecular formula of sample IV?
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