Question

5. The number of atoms in 9.2 g of Na will be: A. 6.2 x 1023 atoms B. 2.408 x 1023 atoms C. 9.2 x1023 atoms D. 23 atoms E. 9.2 atoms

Answer 1

The answer is "Option B"

Step-by-step explanation:

Formula:

Na atoms= Na atoms moles \times NA

`= (mass)/(Na \ Molar\ mass) * 6.022 * 10^(23)\\\\= (9.2)/(23) * 6.022 * 10^(23)\\\\=0.2875 * 6.022 * 10^(23)\\\\=2.4 * 10^(23)\ atoms \\\\`