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You are assigned to separate a mixture of benzoic acid and 2-naphthol using acid base extraction. You are given two possible liquids to dissolve the sample in: ethyl acetate and toluene. Which solvent would be a better choice? Why?
Define if 4.1 g of Pb(NO3)2 is added to enough water to make a 100.0 mL solution, explain what is the final concentration of free nitrate ions (NO3-)
when dr. farrell was a graduate student he once made up a ph 8.0 sodium acetate buffer. why would the casual observer
a 260-rm ml flask contains pure helium at a pressure of 759 rm torr. a second flask with a volume of 470 rm ml contains
Solve for the temperature if there are 1.231 L of 0.5387 moles of nitrogen at a pressure of 731.2 mm Hg.
How is hydrogen bond different from an ionic or covanlent bond?
what kind of subshell is being being filled in groups ia and iia? in groups iiia to viiia? in the transition elements?
The standard enthalpy of atomization of an element is the energy required to convert one mole of an element in its most stable form at 25 Celsius to one mole of monoatomic gas.
Carry synthesis of the following compounds using 4-octyne as the only source of carbon. Provide a full retrosynthetic analysis as well as the complete forward synthesis including all reagents necessary to carry out each step.
Nitrogen and 20% of Oxygen, and that the pressure at sea level is 1.000 atmosphere, calculate the partial pressures of each gas and the total gas pressure in the middle of the stratosphere at 35.00km altitude, where T=240.0 K.
A volume of 25.0 mL of 0.100 M C6H5CO2H(aq) is titrated with 0.100 M NaOH(aq). What is the pH after the addition of 12.5 mL of NaOH. (Ka of benzoic acid = 6.3 ´ 10-5)
The total mass of carbon in living systems is estimated to be 7.5 x 10^17 g. The total mass of carbon on Earth is estimated to be 7.5 x 10^22 g, what is the ratio of carbon atoms in living systems to the total carbon atoms on Earth
The isentropic efficiency of the turbine is 85%. The air is then delivered to the aircraft cabin and leaves the aircraft at 160 C. Calculate. i. The refrigerating effect
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