Esure to answer all parts. recall that there is restricted rotation around carbon-carbon double bonds. maleic acid and fumaric acid are two isomers with vastly different physical properties and pka values for loss of both protons. explain why each of these differences occurs. fumaric acid than maleic acid, giving it a higher melting point. maleic acid is than fumaric acid, giving it greater h2o solubility. in maleic acid, stabilizes the conjugate base after one h is removed, making maleic acid more acidic than fumaric acid. when removing the second h, pka2 is lower for fumaric acid than maleic acid because .

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

level 4 to level 2 : ))