Answer: The mass of 2.20 mol of CrCl3 is approximately 348.37 grams I think.
Explanation: First, we need to find the molar mass of CrCl3 by adding up the atomic masses of chromium (Cr) and chlorine (Cl). The atomic mass of Cr is approximately 52.00 g/mol, while the atomic mass of Cl is approximately 35.45 g/mol. Since there are three chlorine atoms in one molecule of CrCl3, we multiply the atomic mass of Cl by 3.
Calculating the molar mass of CrCl3:
(1 mol of Cr x 52.00 g/mol) + (3 mol of Cl x 35.45 g/mol) = 52.00 g/mol + 106.35 g/mol = 158.35 g/mol
Now that we know the molar mass of CrCl3 is approximately 158.35 g/mol, we can determine the mass of 2.20 mol of CrCl3.
Mass = Number of moles x Molar mass
Mass = 2.20 mol x 158.35 g/mol ≈ 348.37 g
Hope it helps