hitunglah berapa gram massa zat berikut: 1) 3 mol CuSo4 2) 2,8 mol besi 3) 2,5 mol NaCl

1 ) Mr CuSo4 = Ar Cu(1) + S(1) + O(4)
65(1)+32(1)+16(4)
=65+32+64
=161gr/mol
massa= mol × Mr
3 mol × 161 gr/mol
483 gr