The process of change in a population over time is called what?

N2 (g) + 3h2 (g) ⇌ 2nh3 (g) the equilibrium constant kc at 375°c is 1.2. starting with [h2]0 = 0.76 m, [n2]0 = 0.60 m and [nh3]0 = 0.48 m, which concentration (s), if any, will have increased when the mixture comes to equilibrium?

Would you expect the packing efficiency of atoms in a crystalline solid to be greater or less than that in the liquid

Plants perform photosynthesis during the night only during an eclipse only when the sun is not out during the day

Why is neon in the same group as helium in the periodic table?

In a typical chemical reaction the subscript for a particular atom is written

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)

End-users of natural gas include (check all that apply) :