Write out the balanced equation for the reaction that occurs when mg and fe(no3)3 react together.

The balance chemical equation:

Explanation:

When magnesium reacts with  iron (III)nitrate it gives magnesium nitrate along with iron as a product.The chemical reaction is given as:

3 moles of magnesium reacts with 2 moles of iron(III) nitrate to give 3 moles of magnesium nitrate and 2 moles of iron.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%