A Sample of Ammonia Gas Was Allowed to Come to Equilibrium

question 72

Multiple Choice

A sample of ammonia gas was allowed to come to equilibrium at 400 K.
2NH₃(g)
N₂(g) + 3H₂(g)
At equilibrium,it was found that the concentration of H₂ was 0.0372 M,the concentration of N₂ was 0.0124 M,and the concentration of NH₃ was 0.175 M.What is K_p for this equilibrium? (R = 0.0821 L ∙ atm/(K ∙ mol) )

• A)4.28
• B)2.85
• C)1.70 × 10^-2
• D)1.95 × 10^-8
• E)2.26 × 10^-2

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Definitions:

Nominal Rate

The interest rate stated on a loan or investment agreement, not taking into account the effects of inflation, and often differing from the real rate of interest.

Compounded Semi-annually

An interest calculation method where interest is added to the principal sum of a deposit or loan twice a year, leading to compound interest.

Effective Rate

The effective rate, also known as the annual equivalent rate, is the interest rate on an investment or loan that accounts for the effects of compounding over a given period.

APR

Annual Percentage Rate, which is the interest rate for a whole year (annualized), rather than just a monthly fee/rate, as applied on a loan, credit card, etc.