A sample of gas at 301 Kelvin and 1.5 atmospheres has a density of 3.90 g/L. What is the molar mass of this gas? Show all of the work used to solve this problem.

Question

Chemistry

Alice Harmon

14 February, 20:56

A sample of gas at 301 Kelvin and 1.5 atmospheres has a density of 3.90 g/L. What is the molar mass of this gas? Show all of the work used to solve this problem.

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Answers (1)

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Emely Young · Answer 1

PV = nRTP is pressure, V is volume in L, n is number of moles, R is the gas constant, and T is temperature in K

(1.5 atm) (1 L) = (n) (.08206) (301K)

n =.06 moles in one liter

If there are 3.9 grams in. 06 moles then

1/.06 x 3.9 = 64.2 grams per mol