Chapter 8.1, Problem 8.3QAP

Determine whether each of the following equations is balanced or not balanced:

1. $S\left(s\right)+O_2\left(g\right)\to S{O}_3\left(g\right)$
2. $Al\left(s\right)+C{l}_2\left(g\right)\to AlC{l}_3\left(s\right)$
3. $2NaOH\left(aq\right)+H_{2}S{O}_4\left(aq\right)\to 2H_{2}O\left(l\right)+N{a}_{2}S{O}_4\left(aq\right)$
4. $C_3{H}_8\left(g\right)+5O_2\left(g\right)\underset{\to }{\Delta }3C{O}_2\left(g\right)+4H_{2}O\left(g\right)$