Carl dropped an irregularly shaped rock with a mass of 309
into a graduated cylinder. The
graduated cylinder had 10 mL
of water in it and rose to 15 ml
once the rock was added.
What is the density of the rock?
PLEASE HELP

Which osmotic and ionic strategies must marine teleost fishes employ?

Which of the following statements regarding anfinsen's denaturing experiments with ribonuclease a (rnase a) are valid? exposing the denatured protein to air oxidation and then dialysis to remove urea restored the protein to its original functionality. removing urea by dialysis and then allowing air oxidation of the denatured protein restored the protein to its original functionality. denaturing the protein with both urea and β-mercaptoethanol yielded an inactive protein. anfinsen concluded that protein folding is determined by its primary sequence.

In the water cycle , when does water undergo a chemical change