Question

A 3.9 mol sample of Kr has a volume of 301 mL. How many moles of Kr are in a 3.79 L sample at the same temperature and pressure?

and

Calculate the density, in grams per liter, of a gas at STP if 2.86 L of the gas at 16.8 °C and 754.9 mm Hg weighs 0.401 g.

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