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What is the pH of a solution made by adding 20g of potassium acetate to 100 mL of distilled water?
A solution of water (1.86) and glucose freezes at 3.95. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 .
The pH of 0.325g of aspirin (Molar mass 180.2) tablet in 0.5L water is 3.03, What is the pKa for weak, monoprotic acid aspirin? do not disregard x
Write the chemical equation for all the reactions both SN1 and SN2 involving primary and secondary substrates b) Rank the primary halide in order of increasing reactivity toward SN2
iron has a density of 7.874 g/cm3. what is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000 cm by 5.000 cm?
The lithium atom absorbs light at a wavelength of 670nm (red end of the visible spectrum). Why does lithium absorb light at this wavelength but not, for example, 650nm or 690nm
consider the dissolution of mns in water ksp 3.0 times 10-14.mnss h2ol mn2aq hs-aq oh-aqhow is the solubility of
calculate the value of delta s when 1.90 mol of rmch3 rmohl is vaporized at 64.7 circ rm
nbspka for cyanic acid hcno 3.5 x 10-4 at 25degc . write the equilibrium that corresponds to ka. the standard heat of
PCl5 + 4H2O > 5HCl +H3PO4. How many total moles of acid are formed when starting with 4.5 g of PCl5 and excess H2O.
a sample of oxygen that occupies 1.00X 10^6 ml at 575 mm hg is subjected to a pressure of 1.25 atm. what will the final volume of the sample be if the temperature is held constant?
A mixture containing 0.432 mol He(g), 0.312 mol Ne(g), and 0.721 mol Ar(g) is confined in a 8.00 L vessel at 25 °C and a total pressure of 2.92 atm. Calculate the partial pressure in atm of the He gas.
A gas originally at 27 degrees celsius and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 degrees celsius. determine the new volume of the gas and express your answer in Litre.
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