Question

Would extra mass in the crucible cause the "mass of oxygen" to come out too high or too low?Explain?

Answer 1

for us to help we needs more context

Answer 2

Experiment- Determine of the Expirical Formula of Magnesium Oxide
This is the Topic!

Answer 3

so you weighed some magnesium, and then put in in a crucible right?
then heated the crucible which made oxygen react forming magnesium oxide?

Answer 4

Yess Yess! You are right

Answer 5

where does the extra mass come from/?

Answer 6

http://science.csustan.edu/phillips/CHEM1102/Summer%202012/Empirical%20Formula%20of%20Magnesium%20Oxide.pdf
In the last page it talks about everything here..