1) Work out the balanced equation.
2) work out moles of each of your reactants. (Do not combine them....)
3) From your balanced equation work out the ratio of CuCl2 : NaNO3 (Should be 1:2)
4) 1 mole of Cucl2 will react with 2 moles of NaNO3, so times your mole of Cucl2 by two to give them amount of moles that will react with NaNO3 since there is a 1:2 ratio... Now the number you multiplied by two is the moles of Nacl produced since it will have a 2:2 ratio with Nano3 which is basically a 1:1.
5) Times the moles of NaCl produced (which is same as mole of NaNO3 present) by the mr to give the mass of NaCl produced.
Hope this helps.