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In spectrophotometry what is the theory/why is there a linear relationship between i) absorbance and concetration and ii) aobsorbance and path length?
calculate the concentration of cn- and the ph for asolution that is made by mixing 50ml of 0.1 m hclo4 with4.2 ml of
what is the percentage ionization of the benzoic acid in the resulting solution. Ka(benz acid)=6.5 * 10^-5
The speed of light in a vacuum is 2.998x10^8 m/s. what is the speed of kilometers per hour. what is the speed in miles per minutes.
the given data of pyroxene analysis is given w. sio248.90 tio2.12 al2o33.86 fe2o34.65 cr2o30 feo25.35 mno.51 mgo6.87
Phases are optional. A. 0.450 L of 0.420 M H2SO4 is mixed with 0.400 L of 0.200 M KOH. What concentration of sulfuric acid remains after neutralization?
A gas sample with a mass of 0.440g has a volume of 0.224L at STP. The gas has a molar mass of
6naoh 2al -gt 2na3alo3 3h2what volume of hydrogen gas measured at stp would result from reacting 75.0g of sodium
A gaseous mixture of and contains 39.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 545
a couple of drops of water were accidentally placed on the properly folded filter paper before its mass was measured.
Approximately how many grams of KCl are there in 200 mL of a 4.0% by mass KCl aqueous solution? Assume that the density of solution equals that of pure water.
0.8720-g sample of mixture consisting solely of sodium bromide and potassium bromide yields 1.505 g of silver bromide.
A piston has an external pressure of 14.0 . How much work has been done if the cylinder goes from a volume of 0.180 liters to 0.650 liters.
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