Question

The ionic compound MCl3 forms according to

the reaction below.

2M + 3Cl₂ → 2MCI 3

The compound, MCl3, is 54.47% Cl by mass.

% CI in MCI3 = g Cl / g Cl + g M

What is the molar
mass of M?

[?] g/mol M

Answer 1

The molar mass of metal M in MCl3 is calculated to be approximately 88.85 g/mol after finding the molar mass of Cl and subtracting it from the total molar mass of MCl3.

Step-by-step explanation:

To calculate the molar mass of metal M in MCl3, start with the fact that MCl3 is 54.47% Cl by mass. Since there are three Cl atoms in MCl3, you can calculate the mass of Cl in one mole of MCl3 using the atomic mass of Cl (approximately 35.45 g/mol).

Multiplying the atomic mass by three, you get 3 x 35.45 g/mol of Cl = 106.35 g/mol of Cl.

With MCl3 being 54.47% Cl, the total molar mass of MCl3 can be found by dividing the mass of Cl by this percentage (106.35 g/mol / 0.5447), resulting in approximately 195.20 g/mol for the molar mass of MCl3.

To find the molar mass of M, deduct the mass of Cl from the molar mass of MCl3:

195.20 g/mol - 106.35 g/mol = 88.85 g/mol.

Therefore, the molar mass of M is approximately 88.85 g/mol.