Units

[Jada Brown 2H]

Do we write in the units on the partial pressure or concentration of a certain reactant or product we are solving for when given a K value and all other pressures or concentrations?

[vanessas0123]

[concentration].
(pressure) for when there are subscripts / coefficients before the products or reactants.
K values don't have units because they cancel out, from what I know.

[DanielTalebzadehShoushtari2A]

Yes. K is unitless, but concentrations and pressures always have units. In a problem like you described, your final answer would have units.

[Ellis Song 4I]

K values do not have units

[Caroline Beecher 2H]

K, being the equilibrium constant, itself does not have units but when writing in values for the concentration or pressure it is definitely good to add them in. For example it might be molar (M) for concentration or atmospheres (atm) for pressure.