What mass of calcium oxide contains 1.6 g of calcium?

1. Let’s write down the formula of calcium oxide and what we have given and need to be found.
2. Find the molar mass of calcium oxide, we have 56 g / mol.
3. Since the molar mass of calcium itself is 40, and calcium oxide is 56, it means that in 56 g of calcium oxide there is 40 g of pure calcium, and in x g – 1.6 g of pure calcium, let’s make a proportion.
4. Let us express x, we get that 1.6 g of calcium is in 2.24 g of calcium oxide.
Answer: 2.24g