Answer:
Mass = 331.17 g
Explanation:
Given data:
Mass in gram = ?
Number of atoms of K₂SO₄ = 1.18 × 10²⁴ atoms
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
1.18 × 10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.19× 10¹ mol
1.9 mol
Mass of K₂SO₄:
Mass = number of moles × molar mass
Mass = 1.9 mol × 174.3 g/mol
Mass = 331.17 g
