I swear, everyone just ignores my question, but I'm going to ask anyways. A beaker is filled with 5.4 grams of Oxygen gas in a fixed volume of 4.0 liters. One of the valves opened and there remains only 1.7 grams of Oxygen gas, what is the new volume of gas?

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