How could their mass spectra be used to distinguish between the following comnnunrle? Check ali that apply. 2.4.Dimethyl.3 pentanone will have a base peak at m/z=57, whereas the other ho ketones wil have base peaks at m/z=43 2,4 Dimethyl3-pentanone does not have any thydrogens. Therefore, 4 cannot undergo a McLafforty rearrangement, so it witl not have a peak at m/z=58 2.Heptanone will have a base peak at m/z=99, whereas the other two kotones will have base peaks at m/z=43 2,4-Dimettryl-3 pentanone will have a peak at m/z=58 due to a Mctafferty teartangoment. 2.Heptanone will have a peak at m/z=58 due to a Mcc allerty rearangement 4. Heptanone will have a peok at m/z86 due to a Mctatierty rearangement 2. Heptanone has q hydrogens Therefore, if cannot undergo a Malatferty rearangement, so it wil not have a peak of m/z=58 or at m/z=86. 4. Heptanone wil have a base peak at m/z=71. 2heptanone will have a buse peak af m/z=43 and 2,4 dimethy 3-pentanone wil have a besa peok at m/z=71