Look at your unbalanced equation:

Al^3+ + Na3PO4 → Na^+ + AlPO4

How do I use the ratio of AlPO4 to Al3+ to determine the number of moles of aluminum ions?

Sorry i dont understand the question can you rephase it?

Where is the following?

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.