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A buffer is prepared by mixing 161 mL of 0.193 M NaOH with 695 mL of 0.687 M sodium bicarbonate (NaHCO3). Given that the Ka1 of H2CO3 is 4.5 x 10-7 and the Ka2 is 4.7 x 10-11, calculate the pH of the solution.
Do bonds break during the evaporation of the molecular substances hexane and 1-pentanol
What concentration of naphthalene in grams per liter would be needed to give an absorbance of 1.0 at 220nm
what is the experimental value of Avogadro's number. dropper pipet calibration= 68 drops/ml number of drops of oleic acid in the monolayer=16 drops diameter of monolayer = 15.0 cm
Compute the number of kilograms of hydrogen that pass per hour through a 5-mm-thick sheet of palladium having an area of 0.20 m2 at 500°C. Assume a diffusion coefficient
A buffer is made up of 355 mL each of 0.200 M NaHCO3 , and 0.134 M Na2CO3 . Assuming that volumes are additive, calculate
NaOH solution to raise the PH of the waste stream to PH 10, determine the flow rate of NaOH solution in (Gal/min). Assume ideal solution conditions
what is the concentration M of a NaCl solution prepared by dissolving 15.3g of NaCl in sufficient water given 455mL of solution?
Complete the following equation that illustrates a Brønsted-Lowry acid/base reaction. Phases are optional.
A 100.0 Ml SAMPLE OF 0.100 M methylamine (CH3NH2, Kb = 3.7 x 10^-4) is titrated with 0.250 M HNO3. Calculate the pH after addition of each of the following volumes of acid
The saturated vapor pressure of mercury is 0.0020 mmHg at 300 K and the density of air at 300 K is 1,18 g L^-1. (a) Calculate the concentration of mercury vapor in air in mil L^-1. (b) What is the number of parts per million (ppm) by mass of mercu..
What is the pressure inside a system when the system-side column in an open mercury manometer is 75.0 mm lower than the atmosphere side when the atmospheric pressure is 735 mm Hg.
a hungry engineering student reaches for a favorite granola bar while working on a statics assignment if the granola bar contains 240 "calories"
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