A 792 mg sample of a gas containing only sulfur and oxygen occupies a volume of 372 mL at 54°C and 678 mmHg.Identify the gas in the sample.(R = 0.08206 L.atm/K.mol) A)SO B)SO₂ C)SO₃ D)S₂O E)S₂O₂

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Quizplus · Accepted Answer

Using the ideal gas law, we can calculate the number of moles of the gas. Convert 678 mmHg to atm (678/760), 54°C to Kelvin (54+273.15), and 372 mL to liters (372/1000). Plug these into PV=nRT to find moles (n). Then, calculate the molar mass by dividing the mass (0.792 g) by the moles. The calculated molar mass is closest to that of SO₂ (64 g/mol).

A 792 Mg Sample of a Gas Containing Only Sulfur