The infrared spectrum of the starting material (2-methylcyclohexanone) will have a peak present at , which will be absent in the product (2-methylcyclohexanol).

1710 cm^-1

Explanation:

The Infrared spectrum of the starting material  will have a peak present at 1710 cm^-1.  this is because

2-methylcyclohexanone has a ketone group (C=O) which will be  reduced to an alcohol group (O-H), in the product i.e. (2-methylcyclohexanol). therefore the peak for the stretching vibration of the ketone carbonyl (C=O) is present only in the starting material only .and  The peak for the stretching is at 1710 cm^-1

c8h10 is your answerr

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates