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The triangleHfus of ethanol (C2H5OH) is 4.60KJ/mol. How many kilojoules are required to melt 24.5grams of ethanol at its freezing point?
Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the sample? What madd of potassium would you need to have the same number of potassium atoms as there are sodium atoms in the sample of sodium.
Draw the structures of salicylic acid and aspirin. Circle and identify the functional groups present in each compound and sulfuric acid is a catalyst. What does that mean?
The free radical chlorination of isobutane at 25C yields 64% isobutyl chloride and 36% tert-butyl chloride. However, free radical bromination of the same compound at 127C yields only trace amounts of isobutyl bromide and 99% of tert-butyl bromide
Identify the best nucleophile for 2-bromo-2-methylpropane and 2-chloro-2-methylpropane in an Sn1 and a Sn2 reaction; acetone, isopropanol
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
one can of soup contains 305 grams of soup. The soup contains .885 grams of salt. What percent of the soup is salt
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.1 L of 0.20 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.82
determine the numbers of oxygen molecules are required for each molecule of c6h12o6 glucose that is oxidized if glucose
calculate how many mL of 0.200 M NaOH (aq) would be needed to react with the malic acid sample from step c.
Calculate the volume of oxygen required to burn 5.00 L of propane gas, C3H8, to produce carbon dioxide and water, if the volumes of both the propane
Why should the flask be immersed in boiling water as much aspossible? What effect will it have in determining the molecularweight? Explain.
during the titration several milliliters of deionized water are added to the erlenmeyer flask containing the khp
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