Oxidation of Magnesium.

We Did a lab yesterday that invlovles oxidizing Magnesium.
First we had to measure crussible's weight and it wasnt that have about 22g
Then we had to do a alot of math that invlovded measuring a lot of substances.
Then we burned the the magnesium and waited for a long time until it was oxidzed.
Then we meassured it again and fond out how much we were off by