Chapter 7.4, Problem 7.35PP

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

a. $\text{S}\left(s\right)+{\text{O}}_{\text{2}}\left(g\right)—{\text{SO}}_{\text{3}}\left(g\right)$
b. $\text{2Ga}\left(s\right)+{\text{ 3Cl}}_{\text{2}}\left(g\right)\to {\text{2GaCl}}_{\text{3}}\left(s\right)$c. ${\text{H}}_{\text{2}}\left(g\right)+{\text{O}}_{\text{2}}\left(g\right)\to {\text{H}}_{\text{2}}\text{O}\left(g\right)$
d. ${\text{C}}_{\text{3}}{\text{H}}_{\text{8}}\left(g\right)+{\text{ 5O}}_{\text{2}}\left(g\right)\stackrel{\Delta }{\to }{\text{3CO}}_{\text{2}}\left(g\right)+{\text{4H}}_{\text{2}}\text{O}\left(g\right)$