1.

How many atoms and molecules of sulphur are present in 64 g of s8

Answer»

This is a question of moles testing the CONCEPT of AVOGADROS CONSTANT.

We begin by getting molar mass of S₈.

Molar mass of one Sulphur = 32g/mol

Molar mass of S₈ = 32 × 8 = 256g /mol

Moles = mass / molar mass

Moles = 64/256 = 0.25moles

AVOGADROS CONSTANT :

1 mole = 6.02 × 10²³ ATOMS

The number of atoms in S₈ :

6.02 × 10²³ × 0.25 = 1.505 × 10²³ atoms.

The answer : 1.505 × 10²³ atoms



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