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A student was asked to determine the purity of a contaminated sample of ammonium chloride.a sample of 5g was warmed with 100cm^3 of Noah.after all the ammonia was driven off,the excess Noah required 25cm^3 of 0.5mol/dm^3 sulfuric acid for neutralization. calculate the purity of the ammonium chloride in the sample.
Which of the following is not a general characteristic of amides?
Calculate the theoretical pH of 0.250 M weak acid, HA. Calculate the theoretical pH of a 2.5 x 10-3 M weak acid, HA, that has a Ka value of 1.2 x 10-4. What happens to % ionization of the weak acid as you dilute the acid?
the gaseous product of a reaction is collected in a 25.0 l contained at 27 degrees celsius. the pressure in the
find the molecular formula for a compound with the empirical formula ch2o. the molar mass of the compound is 180.2 g/mol
which equation best describes the average rate for the reaction shown. A (aq) + B 9aq) -----> C (aq) + D (aq) A. rate= [C] [D] / [A] [B] B. rate= - deltat/-deltaB C. rate= -delta[C]/delta t D. rate= -delta[A]/delta t E. rate= [A] [B]/ [C] [D]
Determine the partial pressure of each gas in a mixture of gases using Dalton's law of partial pressures
In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175 atm. Calculate K for the reaction.
A gas measures 180. ml. at 870C and 800. mm Hg. Find its volume at standard temperature and 800 mm Hg of pressure.
How many minutes would a 12.5 ampere current have to be applied to plate out 12.5 grams of copper metal from aqueous copper(II) sulfate solution
Lead (2) nitrate reacts with potassium iodide to produce lead (2) iodide and potassium nitrate. if 1.23mg of lead nitrate are consumed, what is the mass of the potassium nitrate produced?
considering the given equation as p4 s h2g --gt ph3g balance this chemical equation and determine how many grams
A child has a dangerous blood lead level of 120ug/100mL. If the child is administered 100 mL of 0.10M Na2 Ca(EDTA), assuming the exchange reaction
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