What is the percent of Cu in CuBr2

The percent of Cu in CuBr2 can be calculated using the atomic masses and stoichiometry of the compound.

The atomic mass of Cu is 63.55 g/mol. CuBr2 is composed of one Cu atom and two Br atoms, with atomic masses of 79.90 g/mol and 35.45 g/mol, respectively.

The molecular mass of CuBr2 can be calculated as:
(1 x Cu) + (2 x Br) = (1 x 63.55 g/mol) + (2 x 79.90 g/mol) = 223.35 g/mol

To determine the percent of Cu, we divide the atomic mass of Cu by the molecular mass of CuBr2 and multiply by 100:
(63.55 g/mol / 223.35 g/mol) x 100 = 28.47%

Therefore, the percent of Cu in CuBr2 is approximately 28.47%.