To get the moles of hydrogen gas, we will use the molar
volume equation, where 1 mole of any ideal gas occupies a volume of 22.4 L. This
was derived using the ideal gas law equation;
PV=nRT ,
where
P - Pressure of the
gas
V - Volume occupied
by the gas
n - number of moles of gas present
R - universal gas constant, usually given as 0.0821atm⋅Lmol⋅
T - absolute temperature of the gas
STP conditions are
defined as a pressure of 1 atm and a
temperature of 273.15 K.
PV=nRT
Here, the moles of hydrogen gas was contained in 21.3
L at STP. To determine the number of moles of hydrogen gas, the 21.3 L must be
divided to 1 mole/22.4 L and we then get the moles of hydrogen gas, which is
0.951 moles.
