If an aldehyde functional group is added to an organic compound, the name will end in blank thank you for the help

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i believe the answer is a.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

that's what i got you can count the number of atoms