Question

How much water, in grams, can be made from
3.59 × 10^24 hydrogen molecules?
Answer in units of g

Answer 1

First you convert 3.59E24 molecules H2 to mols. moles H2 = (3.59E24/6.02E23) = ?
Then follow the steps in this example.
http://www.jiskha.com/science/chemistry/stoichiometry.html