A sample of a gas weighs 3.000 g and has a volume of 870 0 mL at 625.0 torr and 27.0 °C. What is its molar mass?

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A sample of a gas weighs 3.000 g and has a volume of 870 0 mL at 625.0 torr and 27.0 °C. What is its molar mass?

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