224k views
2 votes
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.

User Rlegendi
by
7.6k points

1 Answer

4 votes

Final answer:

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.

User Erik Kaplun
by
8.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.