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what is the distribution coefficient for compound A that is soluble in diethyl ether to the extent of 20g/100ml at room temperature and soluble in water to the extent of 5.0g/100ml at the same temperature?
a.) 2b.) 4c.) 6d.) 8
Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu. Answer 3.507 amu 1.056 amu 0.079 amu 0.564 amu 0.528 amu
What volume of a 0.1 M ClO- solution reacts stoichiometrically with a 10 mL solution of 0.2 M CrO2-? Use the reaction 2 CrO2- + 3 ClO- --> 2 CrO4-2 + 3 Cl- to assist in the calculation.
Explain how to draw NMR structures for compounds that meet these descriptions: a. C2H60; one singlet b. C3H7Cl; one doublet and one septet c. C4H8Cl20; two triplets d. C4H8O2; one singlet, one triplet, and one quartet Any help would be greatly app..
Water (2290 ) is heated until it just begins to boil. If the water absorbs 5.43×105 of heat in the process, what was the initial temperature of the water?
Cyanogen is a gas which contains 46.2 % C and 53.8 % N by mass. At a temperature of 25oC and a pressure of 750 mmHg, 1.50 g of cyanogen occupies 0.714 L.
Assuming that prior experiments have shown the single-step extraction removes only 77% of the ethanol, what is the mass of ethanol in your original unknown. 10.328g mass of ethanol moved by extraction,32.193 g unknown in original solution.
Calculate the percentage of solvent in the dried fabric by weight; and the concentration of solvent in the dryer exhaust in mg/m^3 if the exhaust is at 160 deg F and 1 atm.
Acetylene gas (C2H2) is produced as a result of the following reavtion. CaC2(s) + 2H2O(l) yield C2H2(g) +Ca(OH)2(aq)
The weight of your 1285-kg car is supported equally by its four tires, each inflated to a gauge pressure of 36.0 lb/in2. What is the area of contact each tire makes with the road?
A graduated cylinder contains 131 mL of water. A 18.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 25.0 g piece of lead are added.
Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide
The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution. Calculate the pH of the final solution. Report pH to 2 decimal places.
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