The students study the equations for the reactions of Na and Mg with H2O to explain the outcomes of the reactions. Which observation would provide the best evidence that matter is conserved in the reaction of Na and H2O? AThe number of atoms of Na is the same on both sides of the equation.

BThe number of electrons and protons in Na is equal to the number of electrons and protons in H and O.

CThe mass of Na and H2O that reacts is greater than the mass of H2 produced.

DThe mass of NaOH produced is equal to the mass of H2O that is changed into steam as the Na explodes into flames.

Because of its structure the cell membrane is known as a phospholipid ? a.bilayer b.molecule c.fluid d.barrier

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?