00:01
I will calculate the mass of cobalt that corresponds to the number of atoms present in 57 grams of fluorine.
00:13
We have to know the atomic masses of the two corresponding elements, cobald and fluorine.
00:22
And we need to know the relationship between moles, mass and the atomic mass for a certain element.
00:28
So we can start off with calculating the moles present, the number of moles present in 57 grams of fluorine.
00:39
So using the equation here, we can calculate that.
00:45
So fluorine moles may write that better.
00:55
Fluorine moles would be equal to the mass of fluorine which is 57 .0 grams divided by the atomic mass of fluorine which is 19 .0 grams per moor.
01:14
And the gram units cancel out on each other to give us the final answer, 3 .00 moles...