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Practice Problems 6 F2011

Practice Problems 6 F2011 - CHEMISTRY 1414 Fall 2011...

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CHEMISTRY 1414 Fall 2011 Practice Problem Set 6 Question 1 A sample of sodium perchlorate is decomposed according to the following reaction: NaClO 4 ( s ) Æ NaCl ( s ) + O 2 ( g ) The oxygen gas produced is collected over water at 19.25 °C. If the gas is collected in a 425 mL container and the total pressure exerted by the gas sample is 0.855 atm, what mass in grams of NaClO 4 was decomposed? The vapor pressure of water at 19.25 °C is 16.7 torr. Question 2 Calculate the density of silane (SiH 4 ) gas at 32.5 °C at a pressure of 1327 torr. Question 3 A sample of helium gas at a pressure of 855 torr occupies a volume of 328 mL. If the pressure changes to 1.22 atm, what volume will the gas occupy?
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