Which expression correctly represents a balanced reduction half-reaction?
a. na+ + e ? na
b. na ? na+ + e
c. cl2 + 2e ? cl
d.2 cl ? cl2 + 2e?

What is the number of moles in 15.0 g ash3?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color