Final answer:
The formula for barium bisulfate is Ba(HSO₄)₂ (c).
Step-by-step explanation:
The formula for barium bisulfate is Ba(HSO₄)₂ (c).
Barium bisulfate is formed by the combination of barium ions (Ba²+) and bisulfate ions (HSO₄⁻). The formula indicates that there are two barium ions and two bisulfate ions present in the compound.
The other options provided are not correct. Ba₂HSO₄ (a) indicates the presence of two barium ions and one bisulfate ion. Ba₂(HSO₃)₂ (b) indicates the presence of two barium ions and two bisulfite ions. BaHSO₄ (d) indicates the presence of one barium ion and one bisulfate ion. Therefore, the correct formula is option (c) Ba(HSO₄)₂.