kaway9500 kaway9500

23-12-2017
Chemistry

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There are ________ oxygen atoms in 30 molecules of c20h42s3o2.

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Dejanras Dejanras

29-12-2017

Answer is: 60.
In one molecule of C₂₀H₄₂S₃O₂, there is 2 atoms of oxygen (subscript after oxygen indicates number of atoms of oxygen in chemical (molecular) formula).
So, in 30 molecules of C₂₀H₄₂S₃O₂, there is: 30·2 = 60 atoms of oxygen.

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