Calculate the number of moles of Cl atoms in 6.28 mg CuCl2.
mols CuCl2 = g/molar mass = 0.00628/molar mass CuCl2 = ?
Then there are two Cl^- for every mols CuCl2.
To calculate the number of moles of Cl atoms in CuCl2, we need to follow a few steps.
Step 1: Determine the molar mass of CuCl2.
The molar mass of CuCl2 can be calculated by adding up the atomic masses of its constituent elements. Cu has a molar mass of 63.55 g/mol, and Cl has a molar mass of 35.45 g/mol.
Molar mass of CuCl2 = (63.55 g/mol) + 2 * (35.45 g/mol) = 134.45 g/mol.
Step 2: Convert the mass of CuCl2 to moles.
Given that the mass of CuCl2 is 6.28 mg, we need to convert it to grams before calculating the number of moles. There are 1000 mg in a gram, so 6.28 mg is equal to 6.28/1000 = 0.00628 grams.
Moles of CuCl2 = Mass of CuCl2 / Molar mass of CuCl2 = 0.00628 g / 134.45 g/mol.
Step 3: Calculate the moles of Cl atoms.
CuCl2 has two Cl atoms, so the number of moles of Cl atoms would be twice the number of moles of CuCl2.
Moles of Cl atoms = Moles of CuCl2 * 2.
Now, substitute the values into the formula:
Moles of Cl atoms = (0.00628 g / 134.45 g/mol) * 2.
Performing the calculations, we find:
Moles of Cl atoms = 0.000093115 mol
Therefore, there are approximately 0.000093115 moles of Cl atoms in 6.28 mg of CuCl2.