forgot how to do these:
A graduated cylinder, when filled to the 40.00 mL mark with water (density 1.00g/mL)
and capped with a stopper, had a mass of 352.05 grams. The same cylinder had a rock of mass
37.40 grams placed into it and was re-filled to the 40.00 mL mark with water. The same cylinder
when stoppered (with the same stopper) now had a mass of 383.95 grams. What is the density of
the rock
mass of rock =37.40
volume= h20 40.00 ml + x
volume of rock= dont know