HELP I DONT KNOW ANYTHING ABOUT CHEMISTRY OR BIOLOGY OR WHATEVER THIS IS!

Which of the following pressures is equal to 760 mm hg? 2.0 atm 101.3 pa 101,300 kpa 101,300 pa

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

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