No of `Ca^(2+)` ion present in 1 gm-iorn `Ca^(2+)` is?

The ions present in KHF_(2) are -

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

The concentration of Ca^(2+) ions in a saturated CaF_2 solution is 8.4 mg*L^(-1) at 25^(@) C. Calculate the solubility product of CaF_2 at that temperature.

What is the C.N of Ca^(2+) and F^(-) ions in CaF_(2) crystal lattice ?

How many neutrons are present in ""_(20)^(40)Ca^(2+) ion?

Calculate the concentrations of Ca^(2+) and PO_4^(3-) ions in a saturated [Ca_3(PO_4)_2] solution. Given: K_(sp)[Ca_3(PO_4)_2]=2.0xx10^(-29) (at 25^(@)C )

The Ca^(2+) and F^(-) ions arc located in CaF_(2) crystal respectively at what position ? What is the charge ratio ?

At 25^(@)C , if the molar ionic conductance of Ca^(2+) and Cl^(-) ions in an infinitely dilute soltuion of CaCl_(2) are "119 ohm"^(-1)."cm"^(2)."mol"^(-1) and "76.5 ohm"^(-1)."cm"^(2)."mol"^(-1) , respectively, then for the solution -

Ca^(2+) level in body is controlled by

Mn, Ca and Cl present in PS II play an important role in