The Commercial Production of Phosphoric Acid, H₃PO₄, Can Be Represented

Multiple Choice

The commercial production of phosphoric acid, H₃PO₄, can be represented by the equation $$\begin{array} { l l l l l } 1500 \mathrm {~g} & 298 \mathrm {~g} & 302 \mathrm {~g} & 1000 \mathrm {~g} & 298 \mathrm {~g} \\\mathrm { Ca } _ { 3 } \left( \mathrm { PO } _ { 4 } \right) _ { 2 } + & 3 \mathrm { SiO } _ { 2 } + & 5 \mathrm { C } + & 5 \mathrm { O } _ { 2 } + & 3 \mathrm { H } _ { 2 } \mathrm { O } \\310 \mathrm {~g} / \mathrm { mol } & 60.1 \mathrm {~g} / \mathrm { mol } &12.0 \mathrm {~g} / \mathrm { mol } & 32.0 \mathrm {~g} / \mathrm { mol } & 18.0 \mathrm {~g} / \mathrm { mol }\end{array} \rightarrow 3 \mathrm { CaSiO } _ { 3 } + 5 \mathrm { CO } _ { 2 } + 2 \mathrm { H } _ { 3 } \mathrm { PO } _ { 4 }$$
The molar mass for each reactant is shown below the reactant, and the mass of each reactant for this problem is given above. Which substance is the limiting reactant?

A) H₂O
B) C
C) O₂
D) Ca₃(PO₄) ₂
E) SiO₂