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Cholesterol is a compound suspected of causing hardening of the arteries. A 5.02 g sample of cholesterol was analyzed, and the following data was obtained
carbon 4.21ghydrogen 0.60goxygen 0.21gMM = 386 g/mol
What are the empitical and molecular formulas for the compound?
addition of excess NH3 to this acidic solution produces only a blue solution. Which group III ions are present, which are absent and which are in doubt? How would you remove all doubt?
A large cylinder of He gas,such as that used to inflate balloons,has a volume of 25.0 L at 22 Celsius and 5.6 atm. how many moles of He are in such a cylinder ?
How many millliters of 0.750 M H3PO4 are required to react with 250. mL of 0.150 M Ba(OH)2 if the products are barium phosphate and water
A cell that uses bromine to oxidize hydrogen H^+ under standard conditions at 298 K has a positive potential.
For the molecule shown below, choose all the statements that are true. Soluble is where at least 10 drops of the compound can be added to a particular solvent (in this case, water or hexane-- CH3CH2CH2CH2CH2CH3) and the result is one homogeneous l..
We had this experiment where we took 4-bromo-N-ethanoylbenzeneamine and we refluxed it with HCl to achieve hydrolysis. We then added enough NaOH to render the solution pH 8. We then distilled the mixture in steam to yield 4-bromoaniline. Why was t..
Use the Nutritional information on the food bag to calculate the calories per gram? How does this information compare to your information? How do you explain the discrepancy? How could you do the experiment differently to get a more accurate value..
assuming the end units will be Molarity as well. 13.1mL of AgNo3 solution are reacted with excess Na2CO3 solution to form AgCO3 precipitate. If 5.62mg of Ag2CO3 are formed, what was the original concentration
Describe and explain four ways in which and industrial chemist could increase the yield of nitrous oxide.
If 2.5 mL of seawater contains about .0000000000058 moles of gold (Au), how many atoms of gold are in that volume of seawater
The first ionization energy of magnesium is 738 kJ/mol, the second ionization energy of magnesium is 1451 kJ/mol, and the electron affinity for chlorine is -349 kJ/mol. Prove mathematically using Hess's Law that the formation of magnesium chloride..
Calculate the standard cell potential given the following standard reduction potentials: Al 3+ +3e ? ?Al;E ? =?1.66 V Fe 2+ +2e ? ?Fe;E ? =?0.440 V
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