Problem: A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass. Write the Lewis structure for a molecule of the compound.

FREE Expert Solution

(1) The atomic masses are 12.01 g/mol C, and 1.01 g/mol H. Assuming each % as mass:


85.17 g C×1 mol C12.01 g C=7.136 mol C


14.3 g H×1 mol H1.01 g H=14.158 mol H 




(2): Divide the number of moles of each by the smallest value:

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Problem Details

A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass. Write the Lewis structure for a molecule of the compound.

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Our tutors have indicated that to solve this problem you will need to apply the Lewis Dot Structure concept. You can view video lessons to learn Lewis Dot Structure. Or if you need more Lewis Dot Structure practice, you can also practice Lewis Dot Structure practice problems.

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Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.