Phosphorus trichloride can be made by the following reaction: P₄(s) + 6Cl₂(g) $\rightarrow$4PCl₃(l) What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P₄ are mixed with 42 molecules of chlorine?

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From the balanced equation, we see that 1 molecule of P₄ reacts with 6 molecules of Cl₂ to produce 4 molecules of PCl₃. Therefore, if we have 15 molecules of P₄ and 42 molecules of Cl₂, we have limiting reactant of P₄ since we don't have enough chlorine to react with all of the P₄. To find the maximum amount of PCl₃ that can be formed, we use the amount of P₄ as the limiting reactant: 15 molecules P₄ × (4 molecules PCl₃ / 1 molecule P₄) = 60 molecules PCl₃ Therefore, the maximum amount of PCl₃ that can be formed is 60 molecules. However, we need to check if there is enough chlorine to react with all of the P₄. The amount of chlorine needed to react with all of the P₄ is: 15 molecules P₄ × (6 molecules Cl₂ / 1 molecule P₄) = 90 molecules Cl₂ Since we only have 42 molecules of chlorine, there is not enough to react with all of the P₄. Therefore, the maximum amount of PCl₃ that can be formed is limited by the amount of P₄, which is 60 molecules. Thus, the answer is D) 28 molecules.

Phosphorus Trichloride Can Be Made by the Following Reaction: P4(s) →\rightarrow→

Phosphorus Trichloride Can Be Made by the Following Reaction: P₄(s) $\rightarrow$