Question

Cadmium metal reacts vigorously with yellow crystals of sulfur to produce a yellow powder of cadmium sulfide. a chemist determines that 112.4 g of cadmium reacts with 32.1 g of sulfur. how much cadmium sulfide could be produced from 22.0 g of cadmium metal?

Answer 1

The mass of cadmium sulfide produced on reacting $112.4 g$ of cadmium with $32.1 g$ of sulfur = $112.4 g + 32.1 g = 144.5 g$

$1 g$ of cadmium forms $\frac{144.5}{112.4}$ cadmium sulfide.

So, $22.0 g$ of cadmium will give $22.0 \times \frac{144.5}{112.4} = 28.3 g$ of cadmium sulfide.