Question

A sample of ethyl alcohol OH C2H5 contains 4.2×10^ 23 hydrogen atoms. How many OH C2H5 molecules are present in this sample?

Answer 1

Answer:

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One molecule of C2H5OH contains (5+1) = 6 hydrogen atoms.

Hence, molecules of C2H5OH = (4.2×10^23)/6

=7 ×10^22

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