An atom of an element X weighs 1.5*10to the power-23g. calculate the number of atoms present in 27g of the sample
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Answer:
18 × 10²³ atoms
Explanation:
Weight of 1 atom = 1.5 × 10⁻²³
no of atoms in 27g sample
= 27 / 1.5 × 10⁻²³
= 27 × 10²³ / 1.5
= 270 × 10²³ / 15
= 18 × 10²³ atoms
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