Sample a: 8 ml of hydrogen gas sample b: 5 ml of helium gas sample c: 5 ml of oxygen gas sample d: 8 ml of helium gas which of the following samples have the same density? sample a and sample b sample a and sample d sample b and sample d sample b and sample c

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

Which characteristics can be used to differentiate star systems? check all that apply.

How many distinct monochlorinated products, including stereoisomers, can result when the alkane below is heated in the presence of cl2? 3 4 5 6 7?