In NaCl is doped with `1 xx 10^(-3)` mol percent of `SrCl_(2)` , what is the concentration of cation vacancies ?

If NaCl is doped with 10^(4) mol % of SrCl_(2) the concentration of cation vacancies will be (N_(A) = 6.02 xx 10^(23) mol^(-1))

Read the following passage and answer the questions at the end of it. Conductivity of silicon increases if it is doped with certain other elements. Doping means introduction of small amount of impurities like phosphorus, arsenic or boron in the pure crystal. In pure silicon four valencies are used in bonding with other four adjacent silicon atoms. When a silicon crystal is doped with a group - 15 element (with five valence electrons) such as P, AsSb or Bi, the structure of the crystal lattice remains unchanged. Out of the five valence electrons of group - 15 doped element, four electrons are used in normal covalent bonding with silicon and fifth electron is delocalised and thus conducts electricity Doping a silicon crystal with a group-13 element (with three valence electron) such as B, Al, Ga or In produces a semiconductor with three electrons in dopant. The place where fourth electron is missing is called as electron vacancy or hole. If NaCl is doped with 10^(-3)" mol % " SrCl_(2) then concentration of cation vacancies is

NaCZ is doped with 2 xx 10^(-2) mole% of SrCl_(2) then the number of cation vacancies per mole

If one mole of AgCl is dopped with 10^(-5) mole of AlCl_3 , the number of cation vacancies created are

Concentration of H_3 O^(+) of aqueous barium hydroxide is 5 xx 10^(-9) mol L^(-1) What is the molar concentration of barium hydroxide ?

At certain temperature the proton concentration of pure water is 2.5 xx 10^(-7) M . What is the hydroxyl ion concentration ? What is the magnitude of K_w ?

Consider a certain reaction A to Products with k=2.0 xx10^(-2)s^(-1). Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L^(-1).

The Kc for the reaction I_(2 (g)) hArr 2I_((g)) is 4 xx 10^(-3) . If the equilibrium concentration of atomic iodine is 4 xx 10^(-2) M . What is the concentration of molecular iodine ?