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A substance has an extinction coefficient of 5 x 10^5 L cm^-1 mol^-1. A concentrated solution of this substance has an absorbance too high to measure. You dilute 1 ml of this solution to 25 ml with distilled water; the measured absorbance is 0.2. What is the concentration of the original concentrated solution?
What observed rotation is expected when a 1.62 M solution of (R)-2-butanol is mixed with an equal volume of a 0.810 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long
What volume (V) of 2.20 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.26? (The pKa of acetic acid is 4.76.)
Consider the following equilibrium process at 686°C: CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M.
The solid borax reagent is contaminated with a water-soluble substance that does not react with hydrochloric acid. As a result of this contamination, will Ksp of the borax be reported as too high, too low, or unaffected
determine what is deltabr- deltat if deltabro3- deltat 0.018 ms express your answer in ms? the rate of change bro3-
The optical rotation of a sample composed of only D-lactose is determned [a] abs = 0.99 degrees. [a]d is known to be 52.3 degrees of D-lactose.
What are the equilibrium concentrations of each reactant and product? (All three substances are gases at 250 °C)
A sample of nitrogen gas in a 4.7-L container at a temperature of 28°C exerts a pressure of 3.6 atm. Calculate the number of moles of gas in the sample.
find the normal boiling point of a saturated solution of lif at 100 ? c assuming it un- dergoes complete dissociation.
A 6.50-g sample of copper metal at 25.0 C is heated by the addition of 84.0 J of energy. The final temperature of the copper is ____ C.The specific heat capacity of the copper is 0.38J/g-K.
What mass of platinum will be formed when 12.5 A are passed through molten PtCl2 for 30.0 minutes
What I don't understand is how they got it. I know that tetraphosphorus hexoxide is P4O6 and water is H2O. What I don't understand it how it becomes 4H3PO3.
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