19. Which of the following pairs does not share the same empirical formula? (2 points) O C2H6 and C4H12
O C3H6O3 and C2H4O2
O C2H6 and CH4
O CH2O and C3H6O3

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

What type of matter is made of only one kind of atom

What if it is did darwin used to support his theory of evolution