How many minutes does it take to produce 10.0L of oxygen gas (at standard conditions)

Question

by electrolyzing neutral water with a current of 1.3 A? What is the corresponding volume
of hydrogen gas produced?

thanks so much

Answer 1

2H2O ==> 2H2 + O2
10.0 L O2 at STP = 10/22.4 mols = 0.446 mols or 0.446 x 32 = 14,3 grams O2.
96,485 coulombs will produce 32/4 = 8 g O2 so
coulombs needed = 96,485 x (14.3/8) = ?
Coulombs = amperes x seconds = 1.3*seconds. Plug in coulombs and A and solve for seconds. Convert to minutes. Post your work if you get stuck.