10. A 15.67 g sample of a hydrate of magnesium carbonate was…
10. A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the molar ratio between water and magnesium carbonate? a. 4:1 b. 5:1 c. 6:1 d. 7:1