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Explain if a buffer solution is 0.120 M in a weak acid (Ka = 3.5 × 10-5) and 0.500 M in its conjugate base, define what is the pH?
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
Calculate the percent yield for a student who completed experiment 27A and collected the following data. Give your answer to two decimal places.
The quality of a two-phase liquid-vapor mixture of H2O at 40Oc with a specific volume of 10m3/Kg is
If O2 is collected over water at 40.0 Celsius and a total pressure of 737 mmHg, what volume of gas will be collected for the complete reaction of 23.92 g of NiO?
Cobalt Chloride in varying concentrations Spectrophotometer set to a Wavelength = 510 nm % Transmission = experiment #1 = 31.62, experiment #2 = 89.13 and experiment #3 = 98.86
Calculate the volume of all gases evolved by the complete oxidation of 0.390 of the amino acid alanine if the products are liquid water, nitrogen gas, and carbon dioxide gas; the total pressure is 1.01 ; and = 291.
write a balance chemical equation for the combustion of 1 mol glycerin, and calculate delta H for this reaction at 298K if burning 1.24g of glycerin has a delta E of -54.6 kj
How would the following experimental errors change the calculation of the number of mg of ascorbic acid in fresh orange juice a) student neglected to filter the juice
Calculate the volume change (in Liters) during the oxidation of sulfur dioxide in which ?E = -849.700 kJ and ?H = -852.373 kJ at a constant pressure of exactly one atm and constant temperature
What mass of sodium benzoate should add to 150ml of .15 M benzoic acid solution to obtain a buffer with a ph of 4.25
Compound K reacts with ozone to give phenylacetic acid (C6H5CH2COOH), while similar treatment of L gives 2 products. One product, M, is an aldehyde with formula C7H6O; the other product is glyoxal (CHO)2. Draw the structure of compound M
a 6.0-g sample of nih2o6cl2 is dissolved in aqueous solution. if an excess of ethylenediamine en is added to the
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