Given the reaction at equilibrium: N2 + 3 H2(g) ↔ 2 NH3(g) + heat
Which change will increase the amount of NH3(g) in the system?
A) a decrease in pressure
B) an increase in the concentration of N2(g)
C) an increase in temperature
D) a decrease in the concentration of H2(g)

Which of these best describes an ionic bond?

27 drag each label to the correct location on the image. a particular exosolar system has five planets in total: a, b, c, d, and e. the table lists the orbital periods of these planets in days. planet orbital period (days) a 600 b 80 c 1,000 d 500 e 100 move each planet to its orbit in the system.

What physical property of gold makes panning a useful way to get gold from streams?