Question

2 Na + 2 H2O --> 2 NaOH + H2

How many molecules of H2 could form when 6.59 x 10^20 atoms Na react?

Answer 1

@dtan5457

Answer 2

You can tell from your balanced chemical reaction that for every 2 molecules of Na that react, 1 molecule of H2 is produced.

In other words, for however much Na you put in, you only get half as much H2 out. So if you react 6.59 x 10^20 atoms of Na, how many atoms of of H2 come out?