00:01
So first we need to define some variables.
00:04
We'll say x is equal to the mass of copper 1 oxide, and y is equal to the mass of copper 2 oxide.
00:17
So x plus y equals our 1 gram, or y is equal to 1 minus x.
00:27
Another equation is 0 .83 .90 grams copper is going to be equal to the grams of copper we would get from copper 1 oxide, which will be the mass of copper 1 oxide, divided by its molar mass, one mass, one oxide.
01:04
Has a mass equal to 2 moles copper and 1 mole oxygen, 143 .09, and then 1 mole copper 2 oxide has 2 moles, and then 1 mole copper, according to the periodic table, has a mass of 63 .5 grams.
01:39
So that'll be the mass of copper coming from the mass of copper 1 oxide.
01:45
We'll add to that.
01:48
Why, which is the mass of copper 2 oxide, divided by its molar mass, where 1 mole copper 2 oxide has a molar mass equal to 1 mole copper, 1 mole oxygen, which is 79 .54 grams...