Question

calculate number of molecules of sulphur (S8) present in 128g of sulphur​

Answer 1

Answer:

For that let us first write the values given in the question-$mass = 128g$, the molecular mass of \[{S_8}\]=$8 \times 32g = 256g$. Therefore, the number of molecules of Sulphur (\[{S_8}\]) is $3.011 \times {10^{23}}$.

Explanation:

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Answer 2

Explanation:

Moles = mass/molecular mass , molecular mass of sulphur(S8) = 32x8=256g

128/256=0.5

molecules = moles x avogadro no. =0.5 x 6.022 x 10^23=3.011 x 10^23

=3.011 x 10^23