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

Question

unklerhaukus · Answer

for us to help we needs more context

anonymous · Answer

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

unklerhaukus · Answer

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

anonymous · Answer

Yess Yess! You are right

unklerhaukus · Answer

where does the extra mass come from/?

anonymous · Answer