There’s a 1:1 ratio between the whole reaction so you need to calculate the moles of CuSO4 using the mass given and mr, then that number of miles is equals to the number of miles of Cu because it’s 1:1. So you will have the moles for Cu, and the Mr from the periodic table, so just use Mr= Ma/Mol and rearrange it to find the mass. I hope that’s correct, I haven’t done chemistry in a while 😂 but I’m like 99.99% sure it is