The concentration of reactants or products at any time during the reaction can be calculated from the integrated rate law.
true / false.

True

Explanation:

Due to the fact that it is an equation that expresses the concentrations of reactants or products as a function of time, meaning that it describes the change in concentration of reactant(s) per change in time.

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

i think it is true since you can test the answer and can use observations to complete it.