Final answer:
The mass of 1.12 mol of calcium oxide (CaO) is calculated by multiplying the number of moles by the molar mass of CaO, which totals to approximately 62.8096 grams, or 62.81 grams when rounded properly.
Step-by-step explanation:
To calculate the mass of 1.12 mol of calcium oxide (CaO), you need to use the molar mass of CaO. The molar mass of a compound is found by adding together the molar masses of the individual elements in the compound according to their stoichiometric proportions in the formula.
Calcium (Ca) has a molar mass of about 40.08 g/mol and oxygen (O) has a molar mass of 16.00 g/mol. Therefore, the molar mass of calcium oxide, which contains one atom of calcium and one atom of oxygen, is 40.08 g/mol + 16.00 g/mol = 56.08 g/mol.
Now, to find the mass of 1.12 mol of CaO:
Mass = (Number of moles) × (Molar mass)
Mass = 1.12 mol × 56.08 g/mol = 62.8096 g
Thus, 1.12 mol of calcium oxide has a mass of 62.8096 grams, which can be rounded to 62.81 grams when considering significant figures.