Number of atoms present in 1 g of magnesuim strip is

Question

1. 6.022×10²³

2. 24/6.002×10²³

3. 2.5 ×10²³

4. 0.25×10²³

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Answer 1

ANSWER :  Option (4) 0.25 × 10²³

We know that , 

1 mole i.e 24 g of magnesium consists of 6.022 × 10²³ ( Avogadro's Number ) molecules .

So 1 g of magnesium strip will contain 

= 6.022 × 10²³ /24 

≈ 1/4 × 10²³

= 0.25 × 10²³

^{\(\therefore\)}  1 g of magnesium strip will contain 0.25 × 10²³ molecules.