Question

Using equation: 2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O

Question: How many molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?

Answer 1

Here is an example of a stoichiometry problem. Just follow the steps. Convert molecules to moles this way.
molecules/6.022E23 = moles.
http://www.jiskha.com/science/chemistry/stoichiometry.html