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What are the different kinds of separations in GC chromatography?
A soluble fluoride-containing salt such as NaF is added to "fluoridate" the water (to aid in the prevention of dental cavity). What is the maximum concentration of F- that can be present without precipitating CaF2
What is the strongest base that may exist in water? What happens to stronger bases? (Use methoxide, CH3O1-, as an example.)
One of the components of polluted air is NO. It is formed in the high-temperature environment of internal combustion engines by the following reaction
Calculate the pH of of a solution prepared by mixing 60.0 mL of 0.160 M HCl with 15.0 mL of water. How much antacid containing 400.0 mg of Mg(OH)2 in 5 mL of water is needed
suppose 45.0 g of water at 85 degree celcius is added to 105.0 g of ice at 0 degree celcius. The molar heat of fusion of water is 6.01 kJ mol-1, and the specific heat of water is 4.18 J/g degree celcius.
Write a molecular equation for the reaction between ammonium sulfide and lead(ii) solution
Helium is the lightest noble gas component of air and xenon is the heaviest. Use R=8.314J(mol x K) and M in kg/ml. Find the rms speed of helium in 0 degree C and in 30 degree C
A volume of 5.0 mL of solution of sodium carbonate was analyzed and found to contain 6.34x10^-4 moles of carbonate ion. Calculate the molarity of sodium carbonate in the solution.
Question- An inorganic cation has an electrophoretic mobility of 4.31?10^-4cm^2s^-1V^-1. This same ion has a diffusion coefficient of 9.6?10^-6cm^2s^-1.
Will there be any precipitate in the following situations? If so, then what compound will be the precipitate? Justify your answers. A) 23 micrograms of strontium chloride, SrCl2 is dissolved in 1.50L of 0.0088M ammonium fluoride, NH4F solution
why do we assume that the extra electrons in i3- must be placed on the central iodine atom to exceed the octet rule?is
What length of mirror drive in a Michelson interferometer is required to produce a resolution sufficient to separate a) infrared peaks at 500.6 and 500.4 cm-1
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