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Vitamin C is a monoprotic weak acid, which also is called ascorbic acid (C6H8O6, 176 g/mol). A vitamin C tablet weighing 0.75 g was dissolved in 50.0 mL of water and titrated with 0.250 M sodium hydroxide. It took 15.2 mL of the NaOH solution to reach the end point. What is the percentage of vitamin C in the tablet? Only vitamin C reacted with the NaOH (1:1) ratio.
a 1L flask contained 2g N2, 0.4g H2 and 9g O2 at 27c. what is the total pressure in the flask?
A 158.5mg sample of pure copper is dissolved in a small amount of nitric acid, giving copper(II) ions in solution. This solution is then diluted to a final volume of 1.00L. What is the molar concentration of copper(II) ions in the final solution
The meat from one hazelnut has a mass of 0.985 g. a. What is the mass of a millionth of a mole (10^-6) of hazelnut meats. b. How many moles are in a pound of hazelnut meats
If, when you are extracting an aqueous solution with an organic solvent, you are uncertain as to which layer in the separatory funnel is aqueous, how could you quickly settle the issue?
A 258-mL sample of MEK, an industrial solvent is found to have a mass of 0.599 g at 0.988atm and 100°C. Explain what is the molar mass of MEK
Which of the following would have the lowest frequency factor A( part of the Arrhenius equation in a situation where all concentration are 1M and take place at identical temperatures
What are some of the general properties that distinguish metals
The ksp for Al(OH)3 is 1.9*10^-33. what is the pH of a sauturated solution of Al(OH)3. ignore any hydrolysis
Identify the following molecules as an alkane, alkene, alkyne, alcohol, ether, thiol, aldehyde, ketone, carboxylic acid, ester, amine or amide. One term will not be used.
calculate the standard enthalpy of formation of carbon disulfide cs2 from its elements given the following
5 grams of water are evaporated converted to gaseous water vapor. is the mass of the water less than equal to or
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl. Kb of CH3NH2 = 3.7 10-4.
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