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A sample containing 7.45 grams of KCl is dissolved in sufficient distilled water and reacted with 1000.0 mL 0.300M AgNO3 solution. Excess silver nitrate solution reacted with the metallic copper according to the following reaction: Cu (s) + 2 AgNO3 (aq) ---> Cu(NO3)2 (aq) + 2 Ag (s)
The precipitate is filtered off and a strip of copper weighing 10.00 grams is dropped into the filtrate. After the reaction is terminated, the mass of unreacted copper remaining is: ______
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
A patient needs to take 375 of ibuprofen twice daily. The pills in the bottle are each 250. . How many pills does the patient need to take each time she wants the 375 dosage? Assume that these pills are scored and can be cut in half if necessary.
The 9.0 g ice cube at a temperature of 0 degrees Celsius is added to a cup of coffee whose temperature is 90.0 degrees Celsius as well as contains 120.0 g of liquid. The enthalpy of fusion for is 6.0 kJ mol-1
For the first-order reaction 1/2 N2O4(g) yields NO2(g); change in H = 28.6kJ the rate constant is k=6.84 x 10 to the 4 s-1 at -23 degrees C, and the activation energy is 53.7 kJ/mol. what is the rate constant at 15 degrees C.
what is the change in enthropy for this process in kJ/K*mole. The atomic mass of oxygen is 16.00.
if a sample of cuso4 ofnbsp 2.25 grams are dissolve in 9.3 102 ml of 0.35 m ammonia then determine what are the
why does a salt containing a cation from a weak base and an anion from a strong acid form an acidic solution
If antique brass is 30.0% zinc and 70.0% copper, how many grams of antique brass can be made from 18.0 grams of zinc and 35.1 grams of copper
Glucose is pumped into some animal cells by a symporter powered by simultaneous entry of Na+. The entry of Na+ provides a free-energy input of 10.8 kJ/mol under typical cellular conditions (external [Na+] = 143 mM, internal [Na+] =14 mM
The alcohol content of hard liquor is normally given in terms of the "proof," which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 90. proof gin. The density ..
Microorganisms reduce carbonyl compounds to alochols stereoselectively. 5-chloro-2-pentanone is reduced to (S)-5-chloro-2-pentanol in this way. Distillation of this alcohol over sodium hydride gives a chiral cyclic ether.
How many grams of urea [(NH2)2CO] must be added to 585 g of water to give a solution with vapor pressure 2.63mmHg less than that of pure water at 30 degrees Celsius
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