Answer:
55.56% of Ca
Explanation:
Percent composition is a therm in chemistry defined as the ratio by mass between an element and the compound formed from this element.
In the problem, 20g of Ca are combined with 16g of S to form a compound. The mass of the compound is:
20g + 16g = 36g
Thus, percent composition of calcium is:
20g Ca / 36g × 100 = 55.56% of Ca
