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Excess I2 can be used to determine vitamin C levels in solution. Vitamin C (ascorbic acid) reacts in the following manner:
C6H8*6 (aq) + I2 --> C6H6O6 (aq) + 2H^+ (aq) + 2I^- (aq)
If 40.00mL of 0.4445M I2 was added to a sample containing vitamin C, the unused I2, required 23.95mL of .197M S2O3^2- to react. How many moles of vitamin C were originally present?
What is the molarity of benzyl alcohol if the molecular weight is 108.14, the volume is 5 mL
Which of the following would be expected to have a bent (angular) shape?
Water and 8.00 mol/L potassium nitrate solution are mixed to produce 700 mL of a solution with a concentration of 6.00 mol/L. What volumes of water and potassium nitrate solution are used?
Propose a mechanism for the addition of bromine and water to cyclopentene. Be sure to show how the trans product results
Draw the crystal-field energy level diagram for the 3d obitals and show the placement of d electrons assuming this is a weak-field complex ion.
A physician wrote a prescription for Tylenol 325 mg/5mL with codeine 10 mg/5mL, 5mL three times a day for 4 days as needed for cough. How much Tylenol in milligrams is contained in a teaspoonful?
if 25.0 mL of 0.125 M HCl is neutralized by exactly 14.8 mL of NaOH, what is the concentration of the base?
A helium-filled balloon has a volume of 2.75 L at 17 C. The volume of the balloon decreases to 2.36 L after it is placed outside on a cold day. What is the outside temperature in K?
Isopropyl alcohol is mixed with water to produce a 31.0% (v/v) alcohol solution. How many milliliters of each component are present
Compute the molar mass of vitamin C if a solution of 22.7 g in 100. g of water freezes at -2.40 oC. The Kf of water is 1.858 oC kg/mol.
a) If the initial sample is 8.50 g, what mass of the original iridium-192 remains after 130 days? b) Estimate the half-life of the radioisotope. c) How many days would it take for one-fourth of the sample to decay?
Write the rate law for the clock reaction (equation 1) using variable for exponents.
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