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Some people claim meditation has a wide range of benefits. What are some of the benefits that can be supported by scientific evidence?
Qualitative analysis revealed that an unknown contained the anions. NO3-, Cl- and ClO3-. A student weighed a sample into a beaker and recorded the following data
Devise a version of the van't Hoff equation that applies to vapor pressure by writing the equilibrium constant K for vaporization.
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
What is the pH of a solution that is 0.20 M HC2H3O2 and 0.40 M NaC2H3O2? Ka for acetic acid 1.8 x 10-5. Explain
The cloth shroud from around a mummy is found to have a 14C activity of 8.8 disintegrations per minute per gram of carbon as compared with living organisms that undergo 15.2 disintegrations per minute per gram of carbon.
If you are told that the purity of compound Z is 92% as well as the reported value for its molar extinction coefficient is 45000 M -1 cm -1 at 605 nm. Explain what should you measure as the e of this impure compound Z
What is the minimum heat release rate necessary to flashover the room you sleep in. List assumptions used in solving equation.
How many grams of IBr were initially put into the vessel and determine the equilibrium constant - How many grams of IBr were initially put into the vessel?
The student then took 100 ml of the Mg(OH)2 solution and reacted with HCl(aq). If 13.75 ml of .010M HCL reacted with the OH-(aq), what was the concentration of hydroxide ion in the 100ml solution?
What is the concentration of H3O+ ions in a 0.020M aqueous solution of lithium hydroxide at 25 degrees celcius?
Determine each of the following for a 0.500 M HBr solution. 1) Express your answer using three significant figures [H3O+]= M 2) Express your answer using three decimal places pH= 3)the balanced equation when reacted with LiOH.
a 500 mg tablet of antacid all 500mg is calcium carbonate is put into 250 ml of 0.12m hydrochloric acid. what volume of
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