How many grams of water will react with 1.00 g Na?

Question

please explain

Answer 1

the reaction is 2 mole Na & 2 moles H2O --> 2 moles NaOH & 1 MOle H2

find moles of Na:

1.00 g Na @ 22.99 g/mol = 0.0435 moles of Na

0.0435 moles of Na react with 0.0435 moles of H2O

? g H2O = 0.0435 moles H2O @ 18.02 g/ mol = 0.784g H2O

your answer is (3 sig figs) : 0.784 grams of water