Question

The molecular mass of sulphur is 40u .Find the no. of atoms present in 0.4 g of calcium​

Answer 1

Answer:

No dear molecular mass of Sulphur is not 40u but instead it is 32u,

The molecular mass of calcium is equal to 40u

No of moles = mass /molar mass

n = 0.4/40

n = 0.01 mol

no of atoms = n × Na

= 0.01 × 6.022 × 10^23

= 6.023 × 10^21 atoms

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Answer 2

Explanation:

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