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Three balloons filled with three different gaseous compounds each have a volume of 22.4 L at STP. Would these balloons have the same mass or contain the same number of molecules? Explain.
One hundred grams of water is saturated with NH4Cl at 50 degrees celsius . According to Table G, if the temperature is lowered to 10 degrees celsius, what is the total amount of NH4Cl that will precipitate.
If all the chloride in a 5.000g sample of an unknown metal chloride is precipitated as silver chloride with 70.90mL of 0.2010M silver nitrate, explain what is the percentage of chloride in the sample
Calculate the value of the equilibrium constant for the reaction that occurs when solid sodium oxalate is dissolved in water.
Calculate the pH of the solution that results when 40.0 mL of 0.100 M NH3 is mixed with 20.0 mL of 0.250 M HCl solution.
The initial solution of acetic acid is clear and colourless. A few drops of phenolphthalein indicator are added to each sample. A dilute solution of potassium hydroxide is used as the titrant. As the mixture reaches the endpoint, flashed of pink c..
Calculate the pressure (in torr) in the container if all of the methanol is vaporized. (Assume the ideal gas law, PV = nRT).
When one mole of solid NaOH is dissolved in 1L of solution, 44.5kj of heat are released. How much heat is released when 1.00g of NaOH is dissovled in 100.0mL of water?
write the sequence of 5-oligonucleotide primers you will design to replicate the DNA sequence in question 1a by the polymerase chain reaction (PCR). Indicate the 5' and 3' ends of each primer. this is the DNA sequence
When the equation above is balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O2
in a hydrogen atom the 2s and the 2p orbitals have the same energy. in a nitrogen atom the energies of 2s and the 2p
FeCl3 reacts with only one of the two compounds: aspirin and salicylic acid. With which part of a molecule does FeCl3 react
A gas measures 180. ml. at 870C and 800. mm Hg. Find its volume at standard temperature and 800 mm Hg of pressure.
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