Okay, so I'm horrible at chemistry (grr.) I'm usually awesome at science but this year's teacher expects us to know everything [xx(]But that just means I have to try harder!

Anyways for one question (it just the beg. of the year, so these are the basics, yet I can't figure them out!)

We have a m-V graph...

Sorry its so badly drawn~!

It then asks 'if you put 10.0 mL of A in one balance pan, how much mass of B would you need in the other pan to make it balance? Explain your reasoning'.

'if you have 35.0 mL of B in one balance pan what volume of A would you need in the other pan to make it balance? Explain your reasoning'.

Then, 'Determine whether substance A and B will sink or float'.

Then it tells me to 'defend your answer (sink/float) using a m-V graph' it already gave me the one above so I don't know how to make it different to answer the question!

One more question please: Then it asks me to graph many substances on a m-V graph for example, Aluminum has a density of 2.70 so to graph it would I just put it in fraction form and then the num. is mass and the dem. volume?

Thank you so much for taking the time to help me!! ♪♥♪♥♪♥