posted by Chris .
Completion Stuck on number 7 & 11 on my homewowrk
7)An Equation must never be balanced by changing the _______ in the chemical formula of a substance.
11)If a _______ is used to increases the rate of a chemical reaction its formula is written above the arrow
I think 7 is "subscripts" and 11 is "catalyst."
an equation must never be balanced by changing the