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A 0.1967 g sample of pure ascorbic acid is weighed out and dissolved in 50.0 mL of distilled water in an Erlenmeyer flask. One week later, when about one third of the water in the flask has evaporated, this solution is titrated against 0.01735 M K103 solution and requires 18.75 mL of it to reach the end point.
(a) What mass of ascorbic acid has been oxidized by the air over the week-long waiting period?
consider a nonmetal atom which we will give the symbol x. the element x is a gas at room temperature and can easily
Compare the stuctures of molecular substances with those of giant molecular substance
Calculate the potential developed bya voltaic cell using the following reaction if all dissolved species
the next three questions pertain to the complete combustion of ethyl acetate under constant pressurenbspch3cooc2h5l
After a fatty acid has been desaturated, can it be desaturated a second time immediately thereafter? Why, or why not?
How will understanding the mechanism of a chemical reaction affect your determination of a rate law
In a concentration cell established using 0.120 M Ag+ solution and a saturated AgCN solution, the measured Ecell is 0.8500 V. Calculate the molarity of the Ag+ ion in the saturated solution.
a 1004.0 g sample of calcium carbonate that is 95 pure gives 225 l of carbon dioxide at stp when reacted with an excess
Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Calculate the grams of ethanol needed to provide 388kJ of heat.
Draw the structure of the product that is formed when methyl propanoate undergoes a reaction with an excess
What is the van't Hoff factor for HX in water? b) What is the molality of X1- ions in the solution?
Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product absorbing light at 625 nm, which can be used for the spectrophotometric determination of ammonia.
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