Calculate the volume at STP of these compounds 1,5 mol oxygen gas

Answer 1

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Answer 2

at stp one mol is 22.4 liters
so 1.5 mol is
1.5 * 22.4 = 33.6 Liters

Answer 3

for example see:

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html