4.5 moles of h2 volume

In a standard temperature and pressure, 1 mole of Gas takes a bout 22.4 liters.
So we get: 
1 mole = 22.4 liters
4.5 moles = x liters. 
x = 100.8 (With the Volume of 4.5 moles)
So, 4.5 moles of H2 have a volume of 100.8 liters.
Hope this Helps :)

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .