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17. Calculate the density of methane gas, CH4, under each of the following conditions: a) STP b) 950 torr and 0C c) 400mm and 23C

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17. Calculate the density of methane gas, CH4, under each of the following conditions: a) STP b) 950 torr and 0C c) 400mm and 23C Ans: a) 0.7142g/L b) 0.8928g/L c) 0.4105g/L 18. The best vacuum that can be attained presently is about 1E14kPa at 0C. Under these conditions, how many molecules will be contained in a volume of 1.0mL ? Ans: 2652 molecules

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