What is the mass of 5.50 moles of magnesium chloride, MgCl2?

522.5g

Explanation:

First, we'll begin by calculating the molar mass of MgCl2.

This is illustrated below:

Molar Mass of MgCl2 = 24 + (2x35.5) = 24 + 71 = 95g/mol

Mole of MgCl2 obtained from the question = 5.50 moles

Mass of MgCl2 =?

Mass = number of mole x molar Mass

Mass of MgCl2 = 5.50 x 95

Mass of MgCl2 = 522.5g

Therefore, the mass of 5.50 moles of magnesium chloride, MgCl2 is 522.5g

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%

answer; natural resources;