Explain why the structure of the catalyst and its position within the car are important factors in determining the chemical efficiency of the catalytic converter.

the role of the microscope world in creating new materials .

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

quartz

explanation:

that tool would be a compass