The formula mass of copper(II)chloride is ________ g.

Question

Quizplus · Accepted Answer

To calculate the formula mass of copper(II) chloride, we need to add the atomic masses of copper, two chlorine atoms, and their coefficients according to their subscripts in the molecular formula. The molecular formula of copper(II) chloride is CuCl2, indicating that there is one copper atom and two chlorine atoms per molecule.

Copper has an atomic mass of 63.55 g/mol, and chlorine has an atomic mass of 35.45 g/mol. Therefore, the formula mass of copper(II) chloride can be calculated as:

Formula mass = (1 × atomic mass of Cu) + (2 × atomic mass of Cl)
Formula mass = (1 × 63.55 g/mol) + (2 × 35.45 g/mol)
Formula mass = 134.45 g/mol

Therefore, the best choice is C, with a formula mass of 134.45 g/mol.

The Formula Mass of Copper(II)chloride Is ________ G