Question 1
Hydrogen iodide decomposes according to the equation 2HI(g)

H
2(g) + I
2(g), for which K
c = 0.0156 at 400ºC. 0.550 mol HI was injected into a 2.00 L reaction vessel at 400ºC. Calculate the concentration of HI at equilibrium.
◦ 0.138 M
◦ 0.220 M
◦ 0.550 M
◦ 0.275 M
◦ 0.0275 M
Question 2
Hydrogen iodide decomposes according to the equation 2HI(g)

H
2(g) + I
2(g), for which K
c = 0.0156 at 400ºC. 0.550 mol HI was injected into a 2.00 L reaction vessel at 400ºC. Calculate the concentration of H
2 at equilibrium.
◦ 0.275 M
◦ 0.138 M
◦ 0.0275 M
◦ 0.0550 M
◦ 0.220 M