• # question_answer The number of atoms in 4.25 g of$N{{H}_{3}}$ is A) $2.054\times {{10}^{23}}$            B) $5.043\times {{10}^{25}}$C)      $8.044\times {{10}^{23}}$D)      $6.023\times {{10}^{23}}$

As 1 mole of $\text{N}{{\text{H}}_{3}}=17\,g.$ =1 mole of $N{{H}_{3}}$contains number of atoms $4\times 6.023\times {{10}^{23}}$ So, number of atoms in 4.25 g of total             $N{{H}_{3}}=\frac{4\times 6.023\times {{10}^{3}}}{17}$ $=6.023\times {{10}^{23}}.$ Hence the correct option is (d).