Final answer:
The molar solubility of copper sulfide at 70°C is not provided, so the amount of copper sulfide that would dissolve cannot be determined.
Step-by-step explanation:
At a given temperature, the solubility of a compound can be determined by using its molar solubility constant. Unfortunately, the given information does not include the molar solubility constant for copper sulfide at 70°C. Without this information, it is not possible to accurately determine how much copper sulfide would dissolve at 70°C.
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