# Solve problem: Calculate the number of atoms of the following. (Average atomic mass : N = 14 u, S = 32 u) 1.6 g of sulfur - Chemistry

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Solve problem:

Calculate the number of atoms of the following. (Average atomic mass : N = 14 u, S = 32 u)

1.6 g of sulfur

#### Solution

1.6 g of Sulphur (S)

Molar mass of sulphur = 32 g mol–1

Number of moles = "Mass of a substance"/"Molar mass of a substance"=(1.6"g")/(32"g mol"^-1) = 0.05 mol

Number of atoms of S = Number of moles × Avogadro's constant
= 0.05 mol × 6.022 × 1023 atoms/mol
= 0.3011 × 1023 atoms
= 3.011 × 1022 atoms of S

Number of sulphur atoms in 1.6 g = 3.011 × 1022 atoms of S

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#### APPEARS IN

Balbharati Chemistry 11th Standard Maharashtra State Board
Chapter 1 Some Basic Concepts of Chemistry
Exercises | Q 4. (K)(b) | Page 12