Chapter 7.7, Problem 7.54PP

Write all of the mole—mole factors for each of the following chemical equations:

a. $\text{2A1}\left(s\right)+{\text{ 3Cl}}_{\text{2}}\left(g\right)\to {\text{2A1Cl}}_{\text{3}}\left(s\right)$
b. $\text{4HCl}\left(g\right)+{\text{O}}_{\text{2}}\left(g\right)\to {\text{2Cl}}_{\text{2}}\left(g\right)+{\text{2H}}_{\text{2}}\text{O}\left(g\right)$