8. Which of the following substances exist as discrete molecules?
(1)Oxygen
(2) Graphite
(3) Methane
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

If an atom has 12 protons and 13 neutrons

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.

What are the coefficients to balance the following equation? ba+br=babr2