The number-average molecular weight of poly(acrylonitrile-butadiene) alternating copolymer is 1055145 g/mol. determine the average total number of acrylonitrile and butadiene repeat units per molecule key in your answer as the whole number only. avoiding round-off error by using all the numbers during intermediate steps.

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

1. they vary with a higher number because boiling is way hotter than melting

they are all solids.