Question

The chemical formula for magnesium oxide is MgO. A chemist determined by measurements that 0.030 moles of magnesium oxide participate in a chemical reaction. Calculate the mass of magnesium oxide that participates.

Answer 1

To calculate the mass of 0.030 moles of magnesium oxide, multiply the number of moles by the molar mass of MgO, resulting in 1.20915 grams of MgO.

Step-by-step explanation:

The student asks how to calculate the mass of magnesium oxide (MgO) that participates in a chemical reaction given that 0.030 moles of magnesium oxide are involved. To find the mass of magnesium oxide, you must use the molar mass of MgO. Magnesium oxide has a molar mass of approximately 24.305 g/mol for magnesium (Mg) and 16.00 g/mol for oxygen (O), totaling about 40.305 g/mol for MgO. The mass of MgO can be calculated using the formula:

Mass = moles × molar mass

So for 0.030 moles of MgO, the mass would be:

0.030 moles × 40.305 g/mol = 1.20915 grams of MgO

This calculation results in 1.20915 grams of magnesium oxide being involved in the reaction.