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Which Has More Atoms, 50 G of Aluminium Or 50 G of Iron ? Illustrate Your Answer with the Help of Calculations. - Science

Short Note

Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.

(Atomic masses : Al = 27 u ; Fe = 25 u)

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Solution

Mass of aluminium = 50g

We know that 27g of aluminium contain 6.022 × 1023 aluminium atoms

Number of aluminium atoms in 27g  aluminium = 6.022 × 1023

Number of aluminium atoms in 50g aluminium = 50 × 6.022 × 1023/ 27

Hence, 50g aluminium has11.15 × 1023 atoms.

Mass of iron = 50g

We know that 56g  iron contain 6.022 × 1023 atoms

Number of atoms in 56g iron = 6.022 × 1023

Number of atoms in 50g  iron = 50 × 6.022 × 1023 / 56

Hence, 50g iron comprises 5.376 × 1023 atoms.

It is clear that more number of atoms is present in 50g  aluminium than 50g  iron.

Concept: Atom
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APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Long Answers | Q 32.2 | Page 173
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