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Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4 , of mass 24.0 mg.
an unknown molecule contains only iodine and fluorine and it is 57.2 i by mass. what is the electron domain geometry of
a thermodynamic system undergoes a process in which its internal energy decreases by 510 j. if at the same time 210 j
a chemist weighed out 5.25 g of a mixture containing unknown amounts of baos and caos and placed the sample in a 1.50-l
If the freezing point constant for water is 1.86 ºC/m and assuming ideal conditions, determine the freezing point of a 0.0100 m aqueous solution of Na2SO4.
Define the wavelength and amplitude of a wave. How are these related to the energy of the wave
An alkyne of six carbon atoms gives the same single product in its reaction either with BH3 in THF followed by H2O2 /OH-, or with H2O/Hg2 /H3O . Draw the structure of the alkyne (containing only carbon and hydrogen atoms).
calculate the molar concentration of all the ions remaining in solution after the reaction has taken place ... Cr(III), hydroxide, potassium, nitrate
canned tuna was analyzed by the Kjeldahl method; 22.66ml of .1224M HCl were required to titrate the liberated ammonia. Calculate the percentage of nitrogen in the sample.
calculate the amount of heat required to completely sublime 51.0 g of solid dry ice co2 at its sublimation temperature.
Determine the mass of 28.56 mL of acetone and express your answer in grams? also find out the volume, of 6.54 g of acetone and express your answer , in mL?
A cylinder equipped with a movable piston has a volume of 7.25 L under an applied pressure of 4.52 atm. what is the volume of the cylinder if we decrease
Calculate the mass of water produced when 9.11 g of butane reacts with excess oxygen. Express the mass of water numerically in grams.
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