Final answer:
The mass in grams of 10 L of propane vapor at STP is 18,670 g.
Step-by-step explanation:
To calculate the mass in grams of 10 L of propane vapor at STP, we need to use the molar mass and density of propane. The molar mass of propane (C3H8) is 44.1 g/mol.
First, we need to convert the volume from liters to milliliters. There are 1000 mL in 1 L, so 10 L is equal to 10,000 mL.
Next, we can use the density of propane (1.867 g/L) to find the mass. Multiply the density by the volume:
Mass = density x volume
Mass = 1.867 g/L x 10,000 mL
Mass = 18,670 g
Therefore, the mass in grams of 10 L of propane vapor at STP is 18,670 g.