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A sample of aspirin to be purified has a mass of 1.0g. Aspirin has a solubility of 1.0g in 30ml of water at 37Celcius and a solubilty if 0.10g per 30 ml at 25 Celsius. The sample is dissolved in 30 ml of hot water and cooled to 25 Celcius. How much aspirin would be crystallized? How much aspirin would stay in solution. What is the percent yield of aspirin would be recovered?How could you recover a higher percent of aspirin?
Finding Kc from Products' Moles, Volume and Percent Reacted, The following reaction occurs at 1600 deg. C. Calculate the equilibrium constant Kc for the reaction.
Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth
A dancehall contains 173 men and 238 women. A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women.
What is the number of moles of an ideal gas, if the volume is 67 mL, the pressure is 716 mmHg and the temperature is 34 0C?
Write the mass balances for K+ and the phosphate species in a soln prepared by mixing .025mol KH2PO4 plus
477 J amount Energy is added to a 74.0 grams sample of H 2 O at a temperature of 21 degree Celsius. Determine what will be the final temperature of the H 2 O?
one of the lines in the emission spectrum of sodim has a wavelength of 590 nm. what is the frequeuncy of this line?
The entropy of a gas is larger than that of the liquid because the specific volume of gas is greater thus implying more mutual configurations are allowed for molecules in a gas than in the corresponding liquid.
a gas sample has a volume of .150 L at a temperature of 256 K. What volume will the gas occupy at 288K?
Draw the structures of the compounds listed below in groups of isomers and classify them according to their unique functional groups and number of carbons atoms
A cannonball made of iron has a volume of 115 cm3. If iron has a density of 7.86 g/cm3, what is the mass in grams of the cannonball?
A certain sunstance, intially present at 0.0800 M, decomposes by zero-order kinetic with a rate constant of 2.50 x 10-2 mol/l s. Calculate the time (in seconds) required for the system to reach a concentration of 0.0630
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