According to the collision theory of chemical reactions: According to the collision theory of chemical reactions: high energy collisions result in few successful reactions as there isn't sufficient time for the products to react. low energy collisions result in many successful reactions as there is sufficient time for the reactants to form products. high energy collisions lead to the successful formation of products. low energy collisions do not occur in the gas phase. all of the abo

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

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.