00:01
All right, so we have a balanced chemical equation here.
00:03
And when we have a balanced equation, the coefficients give the mole ratios of the species, where if there's no coefficient, we assume it's a one.
00:12
So if we wanted, for instance, the ratio of moles of h2o to phosphoric acid, we have six moles of h2o to every two moles of h3po4, just reading off the coefficients.
00:29
And then this can simplify to a 3 to 1 ratio.
00:33
So 3 moles of h2o for every 1 mole of h3po4.
00:39
So that ratio that's listed as the first answer choice, that's not true because it's saying 3 to 3, but it's a 3 to 1.
00:47
All right.
00:48
Next answer choice, we're considering the calcium phosphate and the phosphoric acid.
00:54
So we see that we have 3.
00:57
Oh, no, 1 mole is calcium phosphate.
01:00
So one mole of ca3 -p -o -4 -2 for every two moles of h -3 -p -o -4.
01:13
And that's our simplified formula.
01:15
We can't reduce it anymore if one of them is a one...
