How much more NH4Cl needs to be added to have a saturated solution if the water is 45 C and there are already 35g of NH4Cl dissolved?

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

you need to have a picture of the atom that way we can answer it

answerleaving cheese out to get moldy;