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In a styrofoam cup calorimeter, some students who stirred too hard got negative heat capacity for their calorimeter. The students continued to do the experiment and determined the negative heat capacity of a metal and heats of reaction, using the negative heat capacity for the calorimeter.
Explain why negative heat capacity obtained and if the results for the remainder of the experiment could be reasonable?
What are differences between spectrum and continuous spectrum? Give an example. What does it mean when we say that the energy levels in the Bohr atom are quantized?
what amount of heat is produced? The specific heat of aluminum is 0.90J/g C?
Suggest a reason why the cyclic intermediate in the formation of methyl-e-4-methoxycinnamte from p-anisaldehyde, might have two important groups in a trans relationship
The relative molar mass of an element is known to be 32.064 g. Determine the abundance fraction of the isotope whose fraction is not displayed in the table.
Compare the orbital electronic configuration for K and Rb (s block), Hf and Zr (d block), F and Cl (p block). For each element, which ionic configuration should be the most stable?
calculate the mole fraction of toluene in the solution that contains 126g toluene and 94g benzene
Reaction kinetics - Determination of the activation energy of the reaction between oxalic acid and potassium permanganate.
A solution of methanol, CH3OH, cotains 55.0 grams of methanol in 100. mL of water solution. What is the molarity of methanol in the solution?
A 2.50-L container is filled with 187 g argon. If the pressure is 10.0 atm, what is the temperature?
Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.
A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 73.4 kj of heat. Before the reaction, the volume of the system was 7.40L .
Calculate the number of grams of Mg(OH)2 that should dissolve in 100 mL of water.
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