(A) The number of atoms in 52 mole of "He" is 31.3×`10^(24)` (B) the number of atoms in 52amu of "He" is 13 (c) The number of atoms in 52g of "He" is 78.26×`10^(23)`(D) The number of atoms in 52g of "He" is 52.26×`10^(23)`