(Answered) A sample of 30 grams of an ideal gas at 127degc and 10

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A sample of 3.0 grams of an ideal gas at 127°C and 1.0 atmosphere pressure has a volume of 1.5 liters. Which of the following expressions is correct for the molar mass of the gas? The ideal gas constant, R, is 0.08 (L-atm) / (mole K).

[(0.08)(400)] / [(3.0)(1.0)(1.5)]
[(1.0)(1.5)] / [(3.0)(0.08)(400)]
[(0.08)(1.0)(1.5)] / [(3.0)(400)]
[(3.0)(0.08)(400)] / [(1.0)(1.5)]
[(3.0)(0.08)(1.5)] / (1.0)(400)]

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