Final answer:
The mass of 1.15 moles of calcium oxide (CaO) is 64.492 grams, calculated by multiplying the sum of the molar mass of calcium and oxygen (56.08 g/mol) with the number of moles (1.15).
Step-by-step explanation:
To calculate the mass of 1.15 moles of calcium oxide (CaO), you first need to know the molar mass of CaO. Calcium (Ca) has a molar mass of approximately 40.08 g/mol, and oxygen (O) has a molar mass of 16.00 g/mol. Adding these together gives the molar mass of CaO, which is 40.08 g/mol + 16.00 g/mol = 56.08 g/mol.
To find the mass that corresponds to 1.15 moles of CaO, you simply multiply the number of moles by the molar mass of CaO:
- Calculate the molar mass of CaO: 40.08 g/mol (Ca) + 16.00 g/mol (O) = 56.08 g/mol.
- Calculate the mass of CaO: 1.15 moles × 56.08 g/mol = 64.492 g.
The mass of 1.15 moles of calcium oxide is therefore 64.492 grams.