Cu + S → CuS (sulfuro cúprico)
Mm CuS = 95.
61 g / mol S = 32 g / mol Cu = 63.
54 g / mol
1.
Calcular moles de CuS
mol CuS = 64 g S x 1 mol S x 1mol CuS ```````````` `````````````` 32 g S 1mol S
mol CuS = 2
g CuS = 64 g S x 1 mol S x 1mol CuS x 95.
61 g CuS ```````````` `````````````` `````````````````` 32 g S 1mol S 1 mol CuS
g CuS = 191.
22
```````````````````````````````````````````````````````````````````````````````````````````````````` 2Cu + S → Cu2S (sulfuro cuproso)
Mm = Cu2S = 159.
15 g / mol
1.
Calcular moles de CuS
mol CuS = 64 g S x 1 mol S x 1mol CuS ```````````` `````````````` 32 g S 1mol S
mol CuS = 2
g CuS = 64 g S x 1 mol S x 1mol Cu2S x 159.
15 g Cu2S ```````````` `````````````` `````````````````````` 32 g S 1mol S 1 mol Cu2S
g CuS = 318.
3
Nota
Lo resolvi con las 2 valencias del cobre, no indicas si es sulfuro cuprico o cuproso.