6) a cheetah can run at a speed up to 112 km/hr. how fast is this in m/s? if he runs for 4.5 seconds,
how far will he run (in m)? (hint: you need to solve with 2 different setups)

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

it would be a gas formation

i think is conclusions.i think so