Introduction to organic chemistry

Which is the correct general formula for saturated, non-cyclic compounds in the homologous series?

esters — $CnH2n+2O2\text{C}_n\text{H}_{2n+2}\text{O}_2$

primary amines — $CnH2n+3N\text{C}_n\text{H}_{2n+3}\text{N}$

dihaloalkanes — $CnH2n+1X2\text{C}_n\text{H}_{2n+1}\text{X}_2$ (where $X\text{X}$ is a halogen)

acyl chlorides — $CnH2nOCl\text{C}_n\text{H}_{2n}\text{OCl}$

Which is the correct general formula for saturated, non-cyclic compounds in the homologous series?

esters — $CnH2n+2O2\text{C}_n\text{H}_{2n+2}\text{O}_2$

primary amines — $CnH2n+3N\text{C}_n\text{H}_{2n+3}\text{N}$

dihaloalkanes — $CnH2n+1X2\text{C}_n\text{H}_{2n+1}\text{X}_2$ (where $X\text{X}$ is a halogen)

acyl chlorides — $CnH2nOCl\text{C}_n\text{H}_{2n}\text{OCl}$

Introduction to organic chemistry Questions