What is the formula for ethyl methyl amine?

Ethyl methyl amine is a substituted amine consisting of an ethyl group and a methyl group attached to a nitrogen atom. The correct representation captures the arrangement of these groups while maintaining the correct bonding patterns associated with a primary amine.

The correct formula is derived by considering that the nitrogen atom is covalently bonded to both the ethyl group (which has the structure CH₃-CH₂) and the methyl group (which is represented as CH₃). Therefore, the combination yields the formula (CH₃)(CH₃-CH₂)NH, indicating a nitrogen atom bonded to both groups while ensuring correct valency with nitrogen having three bond connections.

The other choices do not accurately represent ethyl methyl amine. The second option presents a straight chain amine without the appropriate group structures, while the third option represents a completely different compound, diethylamine, rather than capturing both the ethyl and methyl groups correctly connected to the nitrogen. The final option introduces a carbonyl functional group, which is not present in ethyl methyl amine as it is purely an amine without any carbonyl compound involvement.