Question 10 of 36beginner🔧 ApplyNumerical3 marks

In three moles of ethane (C₂H₆), calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.

(i)
Answer

6 moles of carbon atoms

(ii)
Answer

18 moles of hydrogen atoms

(iii)
Answer

18.066×102318.066 \times 10^{23} molecules of ethane

Explanation

The molecular formula of ethane is C₂H₆, meaning one molecule of ethane contains 2 carbon atoms and 6 hydrogen atoms. Therefore, 1 mole of ethane contains 2 moles of carbon atoms and 6 moles of hydrogen atoms. To find the number of molecules, we multiply the number of moles by Avogadro's number (6.022×10236.022 \times 10^{23}).

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