Answer:
\[CuS{{O}_{2}}\]; Molar mass = 63.5
+ 96 = 159.5 g
\[\because
\]\[159.5\,g\,CuS{{O}_{4}}\] contains 63.5 g copper
\[\therefore
\]\[100g\,CuS{{O}_{4}}\] will contain \[\frac{63.5}{159.5}\times 100g\]
copper
= 39.81 g
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