00:01
Hello, my name is john, and for this question, we have multiple parts.
00:04
So for the first question, we have to determine the mass of water and the hydrate.
00:08
That's going to be 4 .9 grams subtracted by 0 .256 grams, and that's going to equal 4 .65, or sorry, 4 .644 grams of h2o.
00:36
For number two, we have to determine the percent water composition.
00:41
So that's going to be 4 .644 over 4 .9 times 100%.
00:53
And we find that the percent of water and dehydrate is going to be 94 .78 % h2o.
01:05
Now for number three, we have to determine the number of moles of h2o.
01:11
So we're going to divide 4 .6 .44 grams of h2o, divided by its molar mass, value of 1840...