Question

1. Nickel, a common metal used in a variety of alloys, is purified via the Mond process to a very high (> 99.99%) purity. One of the steps in the Mond process involves the reaction of solid nickel with carbon monoxide to produce Ni(CO)₄, as shown in the unbalanced equation below.

Ni(s) + CO(g) → Ni(CO)₄(g)

How much carbon monoxide, in grams, is required to purify an impure sample containing 4.22 kg of nickel? (to the correct number of sig figs please)

2. Phosphorus pentachloride is a solid that reacts with water to form phosphoric acid and hydrogen chloride gas. The reaction can be represented by the following chemical equation.

PCl₅(s) + 4 H₂O(l) → H₃PO₄(l) + 5 HCl(g)

If 0.137 mol PCl₅ completely reacts with water in this manner, calculate the following. (to the correct number of sig figs please)

(a) the number of moles of HCl produced
(b) the mass in grams of HCl produced

These are two sub questions on a worksheet that I am currently working on. I have redid this problem several times but got different numbers may someone please help me. One of the answers that I got should be correct.

I want to make sure that I am getting the right anwers, and people have been answering my questions but the answers are not correct. Can who ever works this problem out make sure that the answer is correct. I have a limited amount of submissions and questions that I can ask on chegg.

Answer 1