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The concentration of ascorbic acid (vitamin C) in a new beverage is to be determined using a new electrochemical sensor.A 20.00 mL sample of the beverage gave a reading of 2.05 µA. A second aliquot of 20.00 mL was spiked with 1.0 mL of 0.0804 M ascorbic acid.The spiked sample gave a reading of 3.86 µA.
What is the concentration of ascorbic acid in the beverage (to 2 s.f.) in M?
Write a balanced equation for the combustion of heptane, C7H16, in oxygen, , forming the products carbon dioxide, and water, H2O. How many grams of water will be produced by the complete reaction of 7.88 grams of heptane?
Calculate the required quantity of each reagent and the volume of water that must be added for dilution.
What is the free Zn2+ concentration if 0.020 M Zn2+ solution is mixed with an equal volume of 2.0 M NH3? Kf for [Zn(NH3)4]2+ is 4.1 × 10^8
if the rate of decomposition of N2O5 at a particular instant in a reaction vessel is 4.2 x 10^-7 M/s, what is the rate of appearance of NO2
a compound contains 10.13 c and 89.87 cl by mass. determine both the empirical formula and the molecular formula of the
a solution of ethanol c2h5oh in water is prepared by dissolving 62.0 ml of ethanol density 0.79 gcm3 in enough water
A 0.100M (as prepared) solution of dichloroacetic acid has an observed [H30+]= .043 M. What are the equilibrium concentrations and the value of the equilibrium constant for the reaction shown?
Diphosphorous pentoxide(3.54g) has rected with ferric oxide (5.45g). What is/are the mass/masses of the product/products obtained per reaction assuming 85% yield
2Hg+2 + N2H4 ------> 2HG + N2 + 4H+ If 13.52 grams of mercury if formed. If you had 135.0 ml of Hg+2, what was the original concentration of Hg+2
Sketch the line-bond structure for each molecule or polyatomic ion of the following. Designate the formal charges where applicable.
Sort the following transitions from an excited state to a ground state according to the series into which they fall. Drag the appropriate transitions to their respective bins of lyman series
In a strongly basic solution, 5-bromo-5-methyl-1-hexanol converts to a molecule with the same molecular formula, but with a completely different structure. What is the structure
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