Question

Which of the following reactions is a synthesis reaction?

N 2 + 3H 2 → 2NH 3
MgI 2 + Br 2 → MgBr 2 + I 2
KClO3 → KCl + O2
HCl + NaOH → NaCl + H 2 O

Answer 1

Answer:

This one is not balanced. You have 3 O on the left and only 2 on the right: KClO3 → KCl + O2

This one is balanced as written: HCl + NaOH → NaCl + H2O

It would help to have some sort of separator between the equations. That can easily be done by putting the equations in to the body rather than in the title of the question.