Final answer:
To determine the molar mass of the unknown gas, we can use the ideal gas law equation. Plugging in the given values and solving for molar mass, we find it to be approximately 29.0 g/mol. Based on this molar mass, the likely identity of the gas is carbon monoxide (CO).
Step-by-step explanation:
To determine the molar mass of the unknown gas, we need to use the ideal gas law equation:
MM = PV/RT
Where MM is the molar mass, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature.
Using the given values, we can plug them into the equation to calculate the molar mass:
MM = (220.0 kPa)(6.00 L) / (0.0821 L·atm/(mol·K))(5.0 °C + 273.15)
Solving for MM gives us:
MM ≈ 29.0 g/mol
Based on the calculated molar mass of approximately 29.0 g/mol, the most likely identity of the unknown gas is carbon monoxide (CO), which has a molar mass of 28.0 g/mol.