Answer:
Step-by-step explanation:
The correct formula for calcium nitrate would be option C, Ca(NO3)2. This formula represents one calcium ion (Ca2+) and two nitrate ions (NO3-) combined in a compound. Option A, CaNO32, is not a valid formula since the subscript 2 in NO32 implies the presence of two nitrogen atoms, which is not correct. Option B, Ca2NO3, implies the presence of two calcium ions and one nitrate ion, which is also incorrect. Option D, CaNO3, represents one calcium ion and one nitrate ion, which is not the correct ratio of ions present in calcium nitrate.