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An unknown sample of N2+ gave a current of 2.36µA in an electrochemical analysis. When 0.500 mL of solution containing 0.0287M N2+ was added to 25.0 mL of unknown, the current increased to 3.79 µA.
a. Denoting the initial, unknown concentration as [Ni2+]i, write an expression for the final concentration of , [Ni2+]f after 25.0 mL of unknown was mixed with 0.500 mL of standard. Use dilution factor for this calculation.
b. In a similar manner write the final concentration of added standard Ni2+, designated as [S]f.
c. Find the [Ni2+]i in the unknown.
Calculate the root mean square velocity of the CH4 molecules in a sample of CH4 gas at 281 K and at 533 K.
We are asked to construct an energy level diagram (molecular orbital) for the molecule SO. We are then asked to comment on the ionic species of SO - bond order, bond distance etc. So far so good.
The N2 (g) and H2 (g) are allowed to react, producing NH3 (g): N2 (g) + 3 H2 (g) 2 NH3 (g) If the initial volume of the container, before any reaction takes place, is 2.50 L, determine the volume of the container after the N2 (g) and H2 (g) have r..
a sample of oxygen gas has a volume of 2.73 dm3 at 21.0 c . at what temperature would the gas have a volume of 4.00
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To titrate a 5.00 mL sample of a saturated aqueous solution of sodium oxalate, it requires 25.31 mL of 0.02233 M potassium permanganate. How many grams of sodium oxalate would be present in 250.0 mL of the saturated solution
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Predict the stereochemistry of the products formed if the addition of bromine to fumaric acid occurs via
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calculate the mass of Cl2 consumed if the battery delivers a constant current of 853 A for 28.0 min.
What was the Ka value calculated by the student if the pH of the solution was 2.60? Express your answer numerically using two significant figures
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