Hydrogen Iodide, HI, Is Formed in an Equilibrium Reaction When

question 10

Multiple Choice

Hydrogen iodide, HI, is formed in an equilibrium reaction when gaseous hydrogen and iodine gas are heated together. If 20.0 g of hydrogen and 20.0 g of iodine are heated, forming 10.0 g of hydrogen iodide, what mass of hydrogen remains unreacted?

• A)10.0 g hydrogen remains
• B)10.9 g hydrogen remains
• C)15.0 g hydrogen remains
• D)19.9 g hydrogen remains
• E)Need to know the equilibrium constant in order to calculate the answer.

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