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A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.
To find the of X-281, you prepare a 0.083 test solution of X-281. The pH of the solution is determined to be 3.00. What is the of X-281?
process it is given that Rubidium has a heat of vaporization =69.0 kJ/mol at its boiling pt= (686°C). Compute ΔS for this process?
if you have 330 ml of water at 25.00 and add 120ml of water at 95 C what is the final temperature of the mixture
Barium sulfate is used clinically to provide x-ray images of the digestive tract. How might barium sulfate be prepared in the laboratory from a double-displacement reaction of an ionic nitrate compound and sodium sulfate?
Indicate what precipitates, if any, form when solutions of each of the following are added to a solution containing the Group I cations.
When sodium reacts with water, 255 mL of hydrogen gas forms along with sodium hydroxide. What mass of sodium is needed for this reaction?
What is the pH of the buffer after the addition of 0.02 mol of NaOH? C)What is the pH of the buffer after the addition of 0.02 mol of HI? Express Numerically
A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.
ichromate solution is 0.0189 M dichromate, and it took 26.01 mL of your standard iron solution to titrate the excess dichromate in an unknown. What is the chemical oxygen demand of the sample, in units of mg O2/L?
Molecular formula of C10H14. The carbon NMR shows 7 carbon peaks and 4 H peaks. H(4) broad multiplet at 7.0, H(3) singlet at 1.4, H(1) multiplet at 1.2, and H(6) doublet at 1.0. Has strong UV absorbance at 260nm
draw the shape of the molecules and give the orbital geometry around the central atom; the molecular geometry; and give the hybridization state
Calcium Oxide reacts with water in a combustion reaction to producee calcium hydroxide: CaO(s) + H2O(l)----> Ca(OH)2(s)
Calculate the pH after the following amounts of NaOH are added. A) 0mL NaOH added( before the titration started)
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