What is the mass (in grams) of 10.00 L of propane vapor (C₃H₈) at STP?
At STP condition: 1 mole of a gas= 22.4 L
moles of C3H8 = 10.0L/22.4L = 0.446 mol
Mass of C3H8 = 0.446×44.1 = 19.668 g
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