A sealed 66 m3 tank is filled with 4000 moles of ideal oxygen gas (diatomic) at

Question

A sealed 66 m3 tank is filled with 4000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. The gas is heated to a final temperature of 370 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 66 m3 tank is filled with 4000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. The gas is heated to a final temperature of 370 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. 0.97

b. 1.5

c. 1.9

d. 3.9

e. 2.4

Explanation / Answer

You have 66000L of gas volume

Molar mass diatomic oxygen gas = 32g/mol

Mass of gas = 4000*32 = 128000g

Mass density = mass of gas in g / volume of gas in L

Mass density = 128000 / 66000

Mass density = 1.93 g/L

Ans C) - it is closest to 1.93 g/L

In SI units, Density = 1.93kg/m^3

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