Calculate how many grams of magnesium chloride is formed by the interaction

Calculate how many grams of magnesium chloride is formed by the interaction of magnesium weighing 2.4 grams with dilute hydrochloric acid.

m is the mass of the substance
v – amount of substance
Mr – molecular weight

Mg + 2HCl = MgCl2 + H2

To find the amount of magnesium, we use the formula v = m / Mr.

Mr (Mg) = 24 g / mol

v (Mg) = 2.4 / 24 = 0.1 mol

Magnesium chloride will have the same amount of substance:

v (MgCl2) = 0.1 mol

Mr (MgCl2) = 95 g / mol

m (MgCl2) = 0.1 * 95 = 9.5 g

Answer: The mass of magnesium chloride is 9.5 grams.