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Question- Calculate the pH of a 0.20M NH3 / 0.20M NH4Cl buffer after the addition of 30.0 ml of 0.10M HCl to 65.0 ml of the buffer.
Mention step wise computation of your work done
during the quick titration of 10ml of lemon juice with 0.1053moll naoh a student dispensed 82ml sodium
Cobalt-60 is a beta emitter with a half life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 12.0 years?
Express the pressure values numerically in atmospheres, separated by commas. Enter the partial pressure of methane first, then ethane, then propane.
Draw the structure of the product that is formed when but-1-yne is treated with the following reagents:1) disiamylborane; 2) H2O2, KOH; 3) LiAlH4. Disiamylborane = [(i-Pr)(CH3)CH]2BH, a hindered derivative of BH3.
the average adult has about 16 g of sodium ions in her blood. assuminga total blood volume of 5.0 L, what is the molarity of Na+ ions in blood?
The amino acid glycine has the formula C2H5NO2. Define which elements are present in glycine. Explain what is the total number of atoms represented by the formula
Trouble understanding the relationship between the Ka and how acidic a chemical is. Is it safe to say that the more acidic a chemical is the higher the Ka value will be
Correct the absorbance of the spiked samples for dilution and plot the absorbance versus ppm Fe added. Extrapolate the graph to the point where absorbance is equal to zero to determine the amount of Fe in the cat food sample in ppm.
A sample of ammonium dichromate contains 2.25 moles of hydrogen atoms. How many moles of oxygen atoms are in the sample
Alcohols can be dehydrated to alkenes with sulfuric acid and alkenes can be used to prepare alcohols using sulfuric acid detail both mechanisms and explain the differences
how many grams of aspirin are available for immediate absorption by the stomach? Assume immediate dissolution of aspirin and it does not significantly change the pH of the stomach contents. The pKa of aspirin is 3.50 and its molecular weight is 18..
Given stock solutions of 3 M Potassium Acetate and 500 mM EDTA, and a jar of solid Tris powder (molecular mass = 121 g/mol), how much of each component (including water) do you need to make 200 mL of a solution of 75 mM Potassium Acetate
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