What is the percent by mass of oxygen in magnesium oxide, MgO(a) 20%(b

1.	What is the percent by mass of oxygen in magnesium oxide, MgO(a) 20%(b) 40%(c) 50%(d) 60%
Answer» Answer: b Explanation: Mass of magnesium = 24 Mass of OXYGEN = 16 % of Oxygen = (16/40) ×100 = 40 %

What is the percent by mass of oxygen in magnesium oxide, MgO(a) 20%(b) 40%(c) 50%(d) 60%

Answer»

Answer:

Explanation:

Mass of magnesium = 24

Mass of OXYGEN = 16

% of Oxygen = (16/40) ×100 = 40 %