A fire extinguisher releases 1.96 g of an unknown gas that occupies 1.00 L at STP. What is the molar mass (g/mol) of the unknown gas?

Transcribed Image Text:

Strategy Plan STEP 1: What unit is asked for in the answer? STEP 2: What given value is related to the answer? STEP 3: What unit factor(s) should we apply? From the molar volume of a gas at STP, 1 mol = 22.4 L; thus, the unit factors are 1 mol/22.4 L, and 22.4 L/1 mol. Unit Analysis Map given value 1.96 g 1.00 L X unit factor 22.4 L 1 mol Step 1: Step 2: Step 3: 1 mol 22.4 L unit in answer g mol = g/mol 1.96 g/1.00 L or 22.4 L 1 mol