A gas occupies a volume of 30 milliters at 3.5 atm of pressure. If the pressure is increased to 60 atm, while the temperature remains constant, what will be the volume of the gas?

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

58750.08068 is the answer i think

the answer is c.the valence of the atoms combine .