Calculate the total number of ions in 14.6 g CaH2.
Calcium hydride consists of three ions: two hydride (H-) ions and one calcium (Ca+2) ion.
To calculate the actual number of ions in this sample, first the mass (14.6 g) needs to be converted to the amount (in moles).
You need to know the molar mass ...
The solution is given step-by-step with in explanation to achieve the answer.