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calculate the expected pH value of the buffer system 5mL .1M CH3COOH + 5mL .1M CH3COO-Na+ using the henderson-hasselbalch equation using the pKa values: carbonic acid= 6.37 and acetic acid=4.75
why we call benzene phenyl and not benzyle when one hydrogen is removed because in case of alkanes we name them alkyl on the removal of one hydrogen atom.
Determine the amount of heat produced when 100 g of CH4 combust, CH4 + 2O2 yields CO2 + 2H2O + 1063kJ
which effect on atomic size is more significant the nuclear charge or the energy level that electrons are filling?
A sample of glucose, C6H12O6, contains 1.265 x 1021 carbon atoms. (a) How many atoms of hydrogen does it contain?
Determine the temperature change is caused by heat energy and using a beaker that contains 100 mL of H 2 O thermally insulated from its surroundings, one mol of solid CaCl 2 is mixed and solution is stirred
A gas occupies a volume of 2.45 L at a pressure of 1.03 atm and a temperature of 293K. What volume will the gas occupy if the pressure changes to 0,980 atm and the temperature remains unchanged?
Calculate the percent ionization of propionic acid (C2H5COOH) in solutions of each of the following concentrations: a) 0.250 M
Calculate the partition coefficient of caffeine between water and each of the other three solvents. Which of these three organic solvents would be the best choice for extracting caffeine from an aqueous solution?
Calculate the amount of heat required to raise the temperature of 1500g of water from 25C to 63C
we are doing an analysis of cola lab in my chem I lab. We have to do pre-lab questions and one of them is- how will you use compounds of different colors to determine the relationship between percet transmittance and wavelength? or between absorba..
a solid sample containing some Fe+2 ion weighs 1.062g. It requires 24.12mL 0.01562 M KMnO4 to titrate the Fe+2 in the dissolved sample to a pink end point.
The rate law for a hypothetical reaction is rate=k[A]2 When the concentration is 0.10 moles/liter, the rate is 2.7 * 10-5 moles/liter second. What is the value of k?
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