What is the number placed in front of a compound to balance a chemical reaction?

coefficient: they balance the chemical equation you have to make sure the number is as small as it can. It is also used to convert different compounds to compounds or quantities to quantities.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence