Which one of the following Kc expression is correct for given reactionN204⇌2NO2
Correct answer: D. kc=[NO2]2 /[N2O4]
- A. kc=[N2O4]/[NO2]
- B. kc=[N2][O4]/[NO2]
- C. kc=[N2O4]/[NO2]2
- D. kc=[NO2]2 /[N2O4]
Explanation
The equilibrium constant (Kc) for a chemical reaction relates the concentrations of products and reactants at equilibrium. It represents the ratio of the product of product concentrations raised to their stoichiometric coefficients to the product of reactant concentrations raised to their stoichiometric coefficients.In the given reaction, the stoichiometric coefficients are:N2O4: 1NO2: 2Therefore, the correct Kc expression must reflect these coefficients:Kc = ([NO2]^2) / ([N2O4])
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
Practise Fundamental Concepts of Chemistry
894 free Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Fundamental Concepts of Chemistry questions
What is the concentration of nitrate ions? If equal volumes of 0.1M AgnO3 and 0.1 MNaCl are mixed together?
Calculate the percentage by weight of NaCl, if 2.0 g of NaCl is dissolved in 20g ofwater
The branch of chemistry which convert the chemical energy into electrical energy and electrical energy into chemical energy
The rate of reaction_with passage of time.
In which gaseous equilibrium more product will be formed by decreasing pressure
For the reaction 2SO2+O2⇌2SO3