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Lactic acid, CH3CH(OH)COOH, has a Ka value of 1.4x10-4. How many grams of lactic acid must be added to make 151.0 mL of solution with a pH of 2.21?
What is frequency of chemical shift at 1.25 ppm if 400 MHz NMR spectrometer is used
an object made of aluminum has a mass of 8.37 gram. when it was placed in a graduate cylinder containing 20.0 milliter of water, the water level rose to 23.1 milliter. calculate the density and specific gravity of the object.
An oxide of phosphorus contains 56.4% oxygen and has a molar mass of 284 g/mol. What is the molecular formula for this compound?
alculate the volume of .7000 M NaOH required to convert all of the phosphoric acid to sodium dihydrogen phosphate. What is the concentration of the sodium dihydrogen phosphate in the final solution
a flask contains 0.350 grams of liquid br bromine . calculate the number of brbromine molecules present in the flaska
The CaCl2 is purchased in the hydrated form. it contains one mole of water for each mole of compound, NaCO3 * H2O, and had a formula weight of 124.01 g/mol.
if the observed rate constant for the oxidation reaction at 35 C is 6.75*10^-2 min^-1, and at 25 C is 3.25*10^-2 min ^-1. what is the activation energy for the reaction
When iron chloride FeCl3 is dissolved in water the solution becomes acidic. The preparation of the Fe(NO3)3 solution and the KSCN solution used 0.5 M HNO3 as the solvent instead of water. Explain why this was done.
a steel tank with a volume of 9.583L contains N2 gas under a pressure of 4.972 atm at 31.8C Calculate the number of moles of N2 in the tank.
How many grams of KCl would be required to react with 420 mL of 0.42 M AgNO3 solution?
Identify the missing particle in the following equation: 238:92 U --> 4:2 He + ? a) 242:94 Pu b) 234:90 Th c) 242:90 Th d) 234:92 U E) None of these
How many litres of NO are produced at STP when 162 g Ag reacts with excess HNO3
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