Question

I posted a question similar to this one a few days ago and someone helped me with it. but now im on a similar one and i did the same thing to find the answer but it was wrong. what am i doing wrong?

An equilibrium mixture of the following reaction was found to have [CH4] = 0.0203 M and [C2H2] = 0.0451 M at 1700°C. What is the concentration of H2?

2 CH4(g) <-> C2H2(g) + 3 H2(g)
Keq = 0.154 at 1700°C

i got: .518

what am i doing wrong?

Answer 1

You didn't show your work so I can't tell you what you did wrong.
Keq = (C2H2)(H2)^3/(CH4)^2
0.154 = (0.0451)(H2)^3/(0.0203)^2
(H2) = 0.112 M

Answer 2

you didn't show work either you noob!