2Al + 3Cl2 → 2AlCl3

How many grams of AlCl3 are produced when 54.0 grams of Al reacts?

528g AlCl3

Explanation:

***Remember that you need all the terms except "g AlCl3" to cancel out

The atomic mass of Al is about 27g and the atomic mass of AlCl3 is about 132g

You need to take all the numbers and multiply/divide

528g AlCl3 should be your answer

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%