Question

4. A pure sample of calcium oxide contains calcium and oxygen in the ratio 52
by mass. How many grams of calcium will be required to combine with 32 g of
oxygen to form calcium oxide.​

Answer 1

Answer:

80g calcium required to combine 32g of oxygen

Explanation:

we know that

2g of oxygen react with 5g of calcium

1g of oxygen react with5/2 g of calcium

so 32g of oxygen combine with 5/2×32 = 80g

hope you understand