A student passes a magnet over a mixture of iron filings and powdered sulfur. Which model ,begin emphasis, best, end emphasis, represents the student's observations

the answer is either b or c

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

what is the question here. i think you messed up.