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A compound containing only C, H, and O, was extracted from the bark of a sassafras tree. The combustion of 91.3 mg produced 248 mg of CO2 and 50.8 mg of H20. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas.
Calculate the pH of a solution that is formed when 25.0 mL of 0.24 M ammonia (Kb = 1.8 x 10-5) is mixed with 25.0 mL of 0.20 M ammonium chloride.
How much alcohol must be burned to generate enough heat to warm 279kJ from 60 degrees fahrenheit to 180 degrees fahrenheit? Express answer in grams. Show entire process
How many milliliters of 0.10 M HCl must be added to 21.9 mL of 0.40 M HCl to give a final solution that has a molarity of 0.25 M
determine if the brominated product (2,3-dibromo-3-phenylpropanoic acid) is contaminated with some unreacted starting material (during the bromination of trans-cinnamic acid)?
Calculate the grams of iron ion present in a 1.25 mL of a solution that required 2.20mL 0f 0.002115 M KMnO4 in a titration going to a faint pink endpoint.
Calculate this salt's solubilty and the molarities of the ions in a saturated solution. Then use this information in the previous problem to find the solubilty of Pbl2
A bu?er was prepared by mixing 1.0 mole of ammonia and 1.0 mole of ammonium chloride to form an aqueous solution with a total volume of 1.00 liter.
How many kJ of heat are required to produce 13.7g NO2, by 2NO2+ O2 --> 2NO2. the heat of reaction is 113.04
107X with abundance 54.34% and isotopic mass 106.9051 amu and 109X with isotopic mass 108.9048 amu. Use the given information to calculate the atomic mass of the element X to an accuracy of .001%
Describe the technique used to determine the density of approximately 5 gram samples of the following at 20 degrees C and 1 atmosphere pressure: A) Gasoline B) Granular Sugar C) A lump of gold D) Mercury
A solution is made by mixing 12.0 g of NaOH and 75.0 mL of .200 M HNO3. Write a balanced equation for the reaction that occurs between the solutes. Calculate the concentration of each ion remaining in solution. Is the resultant soluiton acidic or ..
Methane burns in oxygen to produce carbon dioxide and water. Burning of 22.00 g of methane in oxygen will produce how many moles
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