Ga (atomic mass 70 u) crystallizes in a hexagonal dose packed structure. The total number of voids in 0.581 g of Ga is __ `xx10^(23)`. (Round off to the Nearest Integer). [Given : `N_(A)=6.023 xx 10^(23)]`

Total number of ions in 17.1 g Al_2(SO_4)_3 is [N_A=6xx10^23]

The number of atoms in 8 g of sodium is x xx 10^23 . The value of x is ____________. (Nearest integer ) [Given : N_A = 6.02 xx 10^23 mol^(-1) Atomic mass of Na = 23.0 u]

The number of atoms in 8 g of sodium is x xx 10^23 . The value of x is ____________. (Nearest integer ) [Given : N_A = 6.02 xx 10^23 mol^(-1) Atomic mass of Na = 23.0 u]

KBr is doped with 10^(-5) mole percent of SrBr_(2) . The number of cationic vacancies in 1 g of KBr crystal is ________ 10^(14) . (Round off to the Nearest Integer). [Atomic Mass : K : 39.1 u, Br : 79.9 u N_(A)=6.023 xx 10^(23) ]

The total number of protons in 10g of calcium carbonate is (N_(0) = 6.023xx10^(23))

The total number of protons in 10 g of calcium carbonate is (N_(0) = 6.023 xx 10^(23)) :-

Molar mass of electron is nearly : (N_(A) = 6 xx 10^(23))