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Hydrogen Iodide Decomposes According to the Equation 2HI(g) ⇌\rightleftharpoons H2(g) + I2(g), for Which Kc = 0

Question 45

Multiple Choice

Hydrogen iodide decomposes according to the equation 2HI(g) ⇌\rightleftharpoons H2(g) + I2(g) , for which Kc = 0.0156 at 400ºC. 0.550 mol HI was injected into a 2.00 L reaction vessel at 400ºC. Calculate the concentration of H2 at equilibrium.


A) 0.275 M
B) 0.138 M
C) 0.0275 M
D) 0.0550 M
E) 0.220 M

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