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Calculate the pH of a solution prepared by dissolving 18.32 grams of benzoic acid and 43.23 grams of sodium benzoate in water sufficient to yield 1.00 L of solution. (The Ka of benzoic acid is 6.30 × 10-5, the molar mass of benzoic acid is 122.12 g/mol, and the molar mass of sodium benzoate is 144.10 g/mol
Describe the differences in the shapes of the electron density distributions for NH3, NCl3, and PF3. Explain how the energy minimized bond angles
why would the chemiluminescence be more pronounced than with the flask stoppered? Why is the chemiluminescence even more pronounced with the ferricyanide/hydrogen peroxide mixture?
Compare the amount of .200 moles of KOH needed to neutralize 50 mL of .200 moles of HNO3 with the amount of .200 moles of KOH needed to neutralize 50 mL of .200 moles of CH3COOH. Is the volume of KOH more, less or the same.
Calculate the ionic strength of 100mM solution of Mg3(PO4)2 in acetic buffer
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
Determine how much heat is evolved or absorbed when 30.0 g of lithium iodide completely dissolves in water.
Copper (II) oxide can be reduced to copper metal by heating in a stream of hydrogen gas:CuO(s) +H2(g) -heat--> Cu(s) +H2O(g)
assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
The student ended up calculating that he/she has 2.19 ppm of Vitamin B2 in the diluted sample. Calculate the percent of the RDI of Riboflavin satisfied by consuming this tablet
If 57.0 of solution is needed to precipitate all the sulfate ion in a 756 sample of , what is the molarity of the solution?
Measurements of strontium in enamel from extracted wisdom teeth were done by atomic absorption spectroscopy. Solutions were prepared with a constant total volume
A solution of potassium hydroxide of unkown concentration is used to titrate 15.0 mL of a 2.5M sulfuric acid solution. The volume of the base is needed 27.2mL. What is the molarity of the base?
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