The concentration of an aqueous solution of urea (CN2H4O) is 0.815 m . Find the concentration of the solute in ppm.

Rutherford's experiment indicated that matter was not as uniform as it appears what part of his experimental results implied this idea

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand