# Problem: Which gas is most dense at 1.00 atm and 298 K? CO2, N2O, or Cl2. Explain.

###### FREE Expert Solution

Gas density is directly proportional to molar mass and pressure, and inversely proportional to temperature (Equation [10.10] in the textbook).

$\mathbf{d}\mathbf{=}\frac{\mathbf{PM}}{\mathbf{RT}}$

• molar mass of CO2 = 44.01 g/mol
• molar mass of N2O = 44 g/mol
• molar mass of Cl2 = 70.9 g/mol
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###### Problem Details

Which gas is most dense at 1.00 atm and 298 K? CO2, N2O, or Cl2. Explain.