Why do we need to weigh 100 pennies rather than just one?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Sugar is dissolved in water. which is the solute? sugar neither both water

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both