Question

Calculate the amount of magnesium oxide produced when 14 g of magnesium is heated. [At. mass of Mg =24, o = 16

Answer 1

If 24 grams of Mg gives 40 grams of Magnesium oxide,
then 14 grams of Mg gives how much magnesium oxide
answer = 14 × 40 / 24 = 23.333 grams
Answer is 23.333 grams of magnesium oxide is produced.
Hope it helps u.....

Answer 2

Answer:

MgO

Explanation:

Mass magnesium = 2.39 g.

Mass magnesium oxide = 3.78 g.

So mass oxygen = 1.39 g.

Number moles Mg = 2.39/24 = 0.0995.

Number moles O= 1.39/16 = 0.0868.

Divide by the smallest to give the ratio approximately 1 Mg: 10.

This would suggest a formula of MgO, which is the correct formula.