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Using a sample of naphthalene (C10H8) of 2.45 grams is contaminated with a material (noncombustible). heat of combustion of naphthalene = -2.45 x 10^3 kJ/mole. the temperature raised to 2.7 degree Celsius When this sample was burned in a bomb calorimeter,. the heat capacity of the bomb calorimeter is known to be 10.6 kJ/C From previous measurements,. Now determine the mass percent of naphthalene(C10H8) in the sample?
Explain why the balloon would float when heated. Make sure to discuss which factors change and which remain constant, and why this matters. Be complete.
Draw a structure showing four water molecules bonded to a central water molecule by means of hydrogen bonding. Explain why the pressure of the atmosphere decreases with increasing altitude
If a temperature of a gas at 1.00atm and 8.00C is increased, resulting in a change of pressure, which equation would you use to calculate the new pressure.
determine the limiting excess reagent amp percent yield of the reaction.aspirin acetylsalicylic acid c9h8o4 can be made
After you determine the concentration of the unknown stock solution, you will need to use the density to calculate the % mass of thymol
Calculate the formate ion concentration and pH of a solution thatis 0.050M in formic acid (HCHO2; Ka=1.8*10^-4) and 0.10M inHNO3
Silver consists of two major isotopes with the following percent abundances and atomic masses: 107Ag (51.84% and 106.90509 amu) and 109Ag (48.16% and 108.90476 amu). Calculate the average atomic mass of silver to five significant digits.
Given that Ea for a certain biological reaction is 48kJ/mol and that the rate constant is 2.5 x 10^-2 s-1 at 15 degrees celsius
HCl (aq) + NaOH (aq) ? NaCl (aq) + H2O (l) A known amount of NaOH is added to a solution containing an unknown quantity of HCl (aq).
For a 0.13 M solution of formic acid, HCOOH, the pH = 2.40. Calculate Ka for formic acid.
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
A chemist calculated the theoretical yield of a product to be 26.8 g. The percent yield was 92.2%. How many g of product were actually obtained
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