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A test for vitamin C (ascorbic acid, C6H8O6) is based on the reaction of the vitamin with iodine: C6H8O6(aq) + I2(aq) ? C6H6O6(aq) + HI(aq) (a) A 25.0 mL sample of juice requires 11.8 mL of a 0.0164 M I2 solution for reaction. how many moles of ascorbic acid are in the sample? (b) What is the molarity of the acid? (c) If a person wanted to consume the FDA recommended 60 mg of Vitamin C, how many ounces of juice would that person need to consume
at 25 degree c the heat of fusion of al is 10.6 kjmol and the heat of sublimation is 326.4 kjmol. what is the heat of
The element silicon has 3 isotopes with the masses and natural abundances shown in the table. Mass of Isotope Natural abundance 27.97693 92.23 28.97649 4.67 29.97376 3.10 What is the average atomic mass of silicon
The entropy change for a reversible process can be defined by the expression ?S = q?/?T. Which statement about entropy change is not correct
Distilled water in equilibrium with air contais dissolved carbon dioxide at a concentration of 1.0 x 10^-5 M. Calculate the pH of such a solution.
Assume that you dissolve 10.7g of a mixture of NaOH and Ba(OH)2 in 229.5 mL of water and titrate with 1.49M hydrochloric acid. The titration is complete after 108.7 mL of the acid has been added.
the equilibrium constant kp for the decomposition of nitrogen dioxide is 4.48 10-13 at 250c. what is the kc for that
What is the concentraion of toulene in this sample? Does this exceed the standard? (maximum contaminant level is 1.0 mg/L 6) How much calcium nitrate has to be added to 1000L of solution to provide 130ppm Ca^2+ if the water supply contains 40ppm Ca..
Write the ionic equation and net ionic equation for the following reactions. Show all work for each balanced equation a. HCl(aq)+ NaOH(aq) b. CH3COOH (aq) + NaOH (aq)
How many L of N2 gas are produced at STP when the airbag inflates if the airbag contains 132g of sodium nitride?
What volume of each of the following solutions contains the indicated amount of dissolved solute? 1.) 4.50g solute in 0.475 M KNO3 2.) 4.50g solute in 0.475 M AlBr3
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing ?, ?, and lone pair electron orbital.
The rate constant for the production of glucose from cellulose with a newly developed catalyst was found to vary with temperature as shown by the data in teh following table. What is the activation energy for this reaction
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