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kingteron5870
19.01.2021 •
Chemistry
Nitrogen dioxide and water react to form nitric acid and nitrogen monoxide, like this:
NO2(g) + H2O(l) →HNO3(aq) + NO(g)
At a certain temperature, a chemist finds that a reaction vessel containing a mixture of nitrogen dioxide, water, nitric acid, and nitrogen monoxide at equilibrium has the following composition
HNO3 15.5g
NO 16.6g
NO2 22.5g
H2O 189.0g
Calculate the value of the equilibrium constant Kc for this reaction. Round your answer to 2 significant digits.
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Ответ:
0.29
Explanation:
Step 1: Write the balanced equation at equilibrium
3 NO₂(g) + H₂O(l) ⇄ 2 HNO₃(aq) + NO(g)
Step 2: Calculate the molar concentration of the substances
We will not calculate the molarity of H₂O because pure liquids are not included in the equilibrium constant. We will use the following expression.
Molarity = mass of solute / molar mass of solute × liters of solution
Since the volume of the vessel is missing, we will assume it is 1 L to see the procedure.
[NO₂] = 22.5 / 46.01 g/mol × 1 L = 0.489 M
[HNO₃] = 15.5 g / 63.01 g/mol × 1 L = 0.246 M
[NO] = 16.6 g / 30.01 g/mol × 1 L = 0.553 M
Step 3: Calculate the value of the equilibrium constant Kc for this reaction
Kc = [HNO₃]² × [NO] / [NO₂]³
Kc = 0.246² × 0.553 / 0.489³
Kc = 0.29
Ответ:
Carbon Forms Covalent Bonds
Carbon Forms Covalent BondsThe most common type of bond formed by carbon is a covalent bond. In most cases, carbon shares electrons with other atoms (usual valence of 4). This is because carbon typically bonds with elements which have a similar electronegativity.Jul 28, 2019
Explanation:
Hope it works out!ᕦᶘ ᵒAdri㉨annaᵒᶅᕤ