In a reaction Mg(s) + 2HCl(aq) →H2(g) + MgCl2(aq), 6.00 g of Mg was present at 0.00 min. After 3.00 min, 4.50 g of Mg remained. Express the average rate as mol of Mg consumed per minute.

Answer 1

g Mg changed = 6.00 - 4.50 = 1.50
mols Mg = grams/atomic mass = ?
Then rate = delta mols/delta time.