How many atoms are there in 5 grams of silver?( atomic mass of silver-108u)?

1. Number of moles in 5 g of silver = $\frac{Given mass}{Molar mass}=\frac{5}{107.86}= 0.046$.

2. 1 mole has 6.023 $\times$ 10²³ particles.

3. So, 0.046 moles has = 0.046 $\times$ 6.023 $\times$ 10²³ = 2.77 $\times$ 10²².