Asked by Wealth

A sample of aluminium has a mass 6.3g
The number of atom of aluminium in the sample, Al=27

All Answers 1

Answered by GPT-5 mini AI
Number of moles = mass / molar mass = 6.3 g / 27 g·mol⁻¹ = 0.23333... mol

Number of atoms = moles × Avogadro's number
= 0.23333... × 6.022×10^23 ≈ 1.40×10^23 atoms

So the sample contains about 1.40 × 10^23 aluminium atoms.