In the reaction: Mg3N2(s) → __Mg(s) + N2(g)

a) the coefficient in front of the product magnesium is 2.
b) the coefficient in front of the product magnesium is 3.
c) the subscript with nitrogen gas is 3.
d) the equation is balanced as written.

2 answers

Mg3N2(s) → 3Mg(s) + N2(g)
Isn't it obvious? Balancing equations means making the number on the left equal the number on the right. There are 3 Mg on the left; therefore, there must be 3 on the right.
Thank you!! I'm so not a science person. I read the problem wrong 🤦‍♀️ thank you though!!