Using this balanced equation in order to produce 7 moles of oxygen gas, how many moles of water would you need to start with? 2H2O -- > 2H2 + O2.

1 Answer
Jan 19, 2018

You would need 14color(white)(l)mol of H_2O.

Explanation:

2H_2O->2H_2+O_2

This means that for every one mole of diatomic oxygen produced, 2 moles of water is required.

(7color(white)(l)molcolor(white)(l)O_2)/1*(2color(white)(l)molcolor(white)(l)H_2O)/(1color(white)(l)molcolor(white)(l)O_2)

molcolor(white)(l)O_2 cancel:

(7cancel(color(white)(l)molcolor(white)(l)O_2))/1*(2color(white)(l)molcolor(white)(l)H_2O)/(1color(white)(l)cancel(molcolor(white)(l)O_2))=14color(white)(l)molcolor(white)(l)H_2O