1. how much magnesium oxide is produced if 12.1 g of magnesium reacts with 16 g of oxygen
according to the reaction mg + o2 + mgo?

20.2g (3 s.f.)

Explanation:

Please see attached picture for full solution.

OPTION C is correct

When magnesium burns, it combines with oxygen (O2) from the air to form magnesium oxide (MgO) according to the following equation: 2Mg(s) + O2(g) → 2MgO(s) Magnesium oxide is an ionic compound containing Mg2+ and O2− ions whereas Mg(s) and O2(g) are elements with no charges.