How many molecules of hydrogen will be required to react completely with 0.600 mol of o2 in order to form water?

The number of molecules of hydrogen that will be required to react completely with 0.600 mol of O2 is calculated as follows

equation for reaction

2H2+O2 = 2H2O

by use of mole ration of H2 to O2 (2:1) the moles of H2 = 0.600 x2 = 1.2 moles

by use of Avogadro law that is 1 mole = 6.02 x10^23 molecules what about 1.2 moles

= 1.2 moles x (6.02 x10^23) / 1mole = 7.224 x10^23 molecules