3) My car has an internal volume of 2600 liters. If the sun heats my car from a
temperature of 200 C to a temperature of 550 C, the pressure inside the car is 760 mm Hg.
How many moles of gas are in my car?

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