105 grams of MgCl2 contains how many mols of MGCl2?
mols = grams/molar mass
Better get your calculator.
To find the number of moles of MgCl2 in 105 grams of MgCl2, you need to use the formula:
moles = grams / molar mass
First, you need to determine the molar mass of MgCl2. To do this, you add up the atomic masses of magnesium (Mg) and chlorine (Cl).
Molar mass of Mg = 24.31 g/mol
Molar mass of Cl = 35.45 g/mol
Molar mass of MgCl2 = (24.31 g/mol) + 2(35.45 g/mol)
= 95.21 g/mol
Now that you have the molar mass, you can plug it into the formula:
moles = 105 grams / 95.21 g/mol
Using the calculator, divide 105 by 95.21:
moles ≈ 1.10 mol
Therefore, 105 grams of MgCl2 contains approximately 1.10 moles of MgCl2.