Based on their composition and structure, list CH3COCH3 C
H
3
C
O
C
H
3
, CH3CH(CH3)CH3
C
H
3
C
H
(
C
H
3
)
C
H
3
, and CH3COOH
C
H
3
C
O
O
H
in order of decreasing intermolecular forces.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.