A sealed 28 m3 tank is filled with 9000 moles of ideal oxygen gas (diatomic) at

Question

A sealed 28 m3 tank is filled with 9000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. The gas is heated to a final temperature of 410 K. The atomic mass of oxygen is 16.0 g/mol. The mass density of the oxygen gas, in SI units, is closest to: A sealed 28 m3 tank is filled with 9000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. The gas is heated to a final temperature of 410 K. The atomic mass of oxygen is 16.0 g/mol. The mass density of the oxygen gas, in SI units, is closest to:

5.1

10

7.7

13 21

Explanation / Answer

Since we're told the oxygen is behaving as an ideal gas, use the ideal gas law:

PV = nRT

Solve for P: P = nRT/V

n = 9000 moles

R = 8.314 m3

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