Can someone help it’s kinda urgent...

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

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation