# Stoichiometry Problems

1. For the reaction:     $6 Li(s) + N_2(g) \rightarrow 2 Li_3N(s)$

Determine:

1. the mass of N2 needed to react with 0.536 moles of Li.
2. the number of moles of Li required to make 46.4 g of Li3N.
3. the mass in grams of Li3N produced from 3.65 g Li.
4. the number of moles of lithium needed to react with 7.00 grams of N2.

2. For the reaction:      $SnO_{2\, (s)} + 2 H_{2\, (g)} → Sn_{(s)} + 2 H_2O_{(l)}$

Determine:

1. the mass of tin produced from 0.211 moles of hydrogen gas.
2. the number of moles of H2O produced from 339 grams of SnO2.
3. the mass of SnO2 required to produce 39.4 grams of tin.
4. the number of atoms of tin produced in the reaction of 3.00 grams of H2.
5. the mass of SnO2 required to produce 1.20 x 1021 molecules of water.