2 H2 + 1 O2 -> 2 H2O How many grams of water can be produced from 3 moles of hydrogen gas?

54 grams

Explanation:

Mole ratio is 2:2

3 mol H2 * 2 mol H2O/2 mol H2 = 3 mol H2O

Convert to grams by using the mass of water

3*18=54 grams

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year