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What is the weight percent concentration of sodium carbonate in your unknown if it takes 37.25 mL of 0.1018 M hydrochloric acid to reach the second equivalence point of the titration of a 0.5376 gram sample of the unknown?
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What is the mass of NaOH present in grams, given that a 100. mL solution has a concentration of 0.125 M?
Carbon-carbon single bonds in organic molecules have energies about350. kJ/mol. What is the corresponding wavelength? Could UV lamps(248 nm) be used to break these bonds?
One liter of nitrogen (N 2 ) and one liter of carbondioxide (CO 2 ), initially at one atmosphere pressure, are forcedinto a single evacuated 500 mL vessel. What is the total pressure, in atmospheres,if the temperature re ...
Silver nitrate has the molecular formula AgNO3. In a 109.0 g sample of silver nitrate, how much of that mass (in g) is from the silver atoms?
At rest, a person inhales 9.72*10^21 nitrogen molecules in an average breath of air. How many mole of nitrogen atoms are inhaled? (Hint: in air, nitrogen occurs as a diatomic molecule)
Diagonal relationship and anomalous behaviour of the each element of the periodic table
The mass of a sample of CaCO3 is 751 grams How many total atoms are present in this sample?
Barium Iodate (Ba(IO3)2) forms an equilibrium with is ions in solution. How does adding additional barium to the solution affect the Ksp of barium iodate. Explain.
The density of air at STP is 1.29g/L. If your stoppered the250mL flask contains 242mL of water(also the volume of air it would contain), calculate the mass of air in the flask under STP.
A person's blood alcohol (C 2 H 5 OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balanced equation is 16 H + (aq) + 2 Cr 2 O 7 2- (aq) + C 2 H 5 OH (aq) 4 ...
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