How many moles of H₂O can be formed from 3.85 × 10²³ molecules of NH₃ from the following equation? 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

Answer 1

4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

This equation is already balanced so we can use it for the next steps.

1) Convert molecules of NH3 to moles of NH3 by using Avogadro's number

2) use the stochiometric relationship of NH3 and H2O based on the balanced chemical equation and that will give you the moles of H2O produced with that amount given in the problem.

Step 1:

3.85 × 10²³ molecules of NH₃ x ( 1 mole of NH3/6.02 x 10²³ molecules of NH3) = 0.6395348...moles of NH3

Step 2:

0.6395348...moles of NH3 x ( 6 moles of H2O/4 moles of NH3) = 0.959302... moles of H2O

the final answer should be expressed to 3 sig figs therefore 0.959 moles of H2O are produced