What is the mass of:

5.00 x 10^-2 mol CuCl2

The mass of 5.00 x 10⁻² mol CuCl₂ is 6.725 grams

calculation

mass = moles x molar mass

from periodic table the molar mass of CuCl₂ = 63.5 + (35.5 x2) = 134.5 g/mol

moles is therefore = 5.00 x 10⁻² x 134.5 g/mol = 6.725 grams