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what must a solute's distribution ratio be if 99% of the solute in a 50ml sample is to be extracted with (a) a single 50 ml portion of an organic solvent? (b)two 25 ml portions of the organic solvent?
determine the mass of lithium hydroxide produced when 0.38 grams of lithium nitride reacts with water according to the following unbalanced chemical equation
Calculate the [H3O+], pH, and the fraction of dissociation (α) in an aqueous 0.140 M NH3 solution. (Hint: You will need the Ka, located in the back of your textbook.)
The mass of purified sample of impure benzoic acid was .630g. How would I find the percentage recovery of my impure benzoic acid? And are the numbers I got in the lab reasonably correct?
In order to produce 10000.0 kJ of energy, how many grams of oxygen must react?
At 46°C a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to one-eighth (0.125) of the original value at the same temperature
an archaeological sample contains 0.743g of lead -206 and 2.145g of uranium - 238. Assume that all the lead now present in the rock came from the radioactive decay of the uranium and that no appreciable amounts of other radioactive nuclides are pr..
Consider the following qualitative analysis scenario and then classify what type(s) of qualitative analysis principle is/are being used. More than one choice may be correct.
Identify the likely kinds of intermolecular forces in the following substances: HCL , CH3CH3, CH3NH2, Kr
Would the following procedural errors cause an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case.
Nitrogen Oxide is a pollutant in the lower atmosphere that irritates the eyes and lungs and leads to the formation of acid rain. Nitrogen oxide forms naturally in the atmosphere according to the following endothermic reaction
1- calculate the radius of a marble of mass 75.673g and density 2.443g/cm3, volume of sphere V= (4/3)?r3)
Given a balanced chemical equation and enthalpy of reaction, relate energy change to amount of reactant or product
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