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Extract a solute from 100 mL of water using only 300 mL of ether. The partition coefficient between ether and water is 3.0. Calculate q, the fraction of solute that would remain in the water under each of the following extraction conditions: Three extractions with 100 mL of ether; Three extractions with 100 mL of ether: six extractions with 50 mL of ether.
If 15 grams of copper (II) chloride react with 20 grams of soduim nitrate, how much sodium chloride can be formed?
The pressure on a balloon holding 350 mL of an ideal gas is increased from 254 torr to 1.00 atm. What is the new volume of the balloon (in mL) at constant temperature?
A 1.20 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 735mmHg .
describe the difference between what the retina does and what the striate cortex does?
the freezing point of the solution is lowered by 4.10 °C. The freezing point and Kf constant for cyclohexane can be found here. Calculate the molar mass of quinine
What was the molar solubility of CaCO3 in this solution (Kb1(CO32-) = 1.8 × 10-4)
The half life for the first order decay of 99Mo is 66.02 hours. How long will it take for a sample of 99Mo to decay
Calculate the energy in joules and calories lost when 10.0 gm ethanol, {C_2H_5OH}, cools from 62.5 0C to -46.0 0C?
Photosynthesis is estimated to produce 330.0 g (dry weight) of plant matter per square meter, 50% of which is carbon. Calculate the total number of grams of carbon "fixed" each year by 1000 square meters.
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
How many grams of H2O can be cooled from 45 degrees C to 15 degrees C by the evaporation of 63 grams of water.
identify and discuss 3 key features associated with the combustion of polymeric materials or compounds that are relevant to the safety and health of an EHS
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