Answer
A) 4.3 g
B) 22.6 g
C) 19 g
Work Step by Step
A) 10.8g - 6.5g = 4.3 g
B) 13.6g + 9.0g = 22.6 g
C) 31.5g -12.5g = 19 g
Explanation:
Because mass is conserved in a chemical reaction, in which the sum of the masses of the reactants must equal of the mass of the products, simply make sure the mass of magnesium plus the mass of oxygen equals the mass of MgO