posted by Jetta .
use the molar volume of a gas to solve the following at STP:
a. the number of moles of O2 in 44.8 L O2 gas.
b. the number of moles of CO2 in 4.00L CO2 gas.
c. the volume(L) of 6.40g O2.
d. the volume(mL) occupied by 50.0g neon.
Just remember the molar volume of a gas at STP is 22.4L; i.e., 1 mole of a gas @ STP will occupy 22.4 L.
Where grams is given, moles = grams/molar mass.