CHEMISTRY 1414 Fall 2011 Practice Problem Set 6 Question 1A sample of sodium perchlorate is decomposed according to the following reaction: NaClO4 (s)ÆNaCl(s)+ O2 (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 NaClO4was decomposed? The vapor pressure of water at 19.25 °C is 16.7 torr. Question 2Calculate the density of silane (SiH4) gas at 32.5 °C at a pressure of 1327 torr. Question 3A 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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