18. What is one of the three things that cause the surface currents of the oceans? A. differences in salinity
B. temperature differences
C. density differences
D. Coriolis effect

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?