what is the chemical formula for copper(ii) sulfate?\no cuso₄\no cu₂so₄\no cus\no cu₂s

Brief Explanations:

Copper(II) has a +2 charge ($Cu^{2+}$), and sulfate ion is $SO_{4}^{2 - }$. To form a neutral compound, the charges must balance. One $Cu^{2+}$ and one $SO_{4}^{2 - }$ combine to form $CuSO_{4}$.

Answer:

A. $CuSO_{4}$