Analysis of a reaction mixture showed that

it had the composition 0.417 mol/L N2,
0.539 mol/L H2, and 0.127 mol/L NH3 at
800 K, at which temperature Kc = 0.278 for
N2(g) + 3H2(g) *) 2NH3(g) .
Calculate the reaction quotient Qc .

6 answers

Qc = (NH3)^2/(H2)^3(N2)
Substitute the numbers and solve.
Actually, "Dr." Bob, you should insert subscripts and superscripts. It would help convey the point.
^shots fired
oh shi, dad you got roasted
how's the quest going friendos
Son. Just quit. Being a math doctor is not good for you ;)