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A researcher studyng the nutritional value of a new candy places a 4.50 gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.68 C. If that heat capacity of the calorimeter is 46.40 kJ*K^-1, how many nutritional calories are there per grams of the candy?
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 397nm. What is the value of n for the level to which the electron relaxed?
Write the structures that would be formed when phosphatidyserine is cleaved with the following enzymes. 1. phospholipase A1 2. phosholipase A2 3. phospholipase C 4. phospholipase D
Show the reaction equation for when sodium carbonate is added to acetic acid Show the reaction equation of acetic acid and dilute sulphuric acid. Potassium manganate is also added.
why would a direct measurement of the heat of decomposition of sodiium hydrogen carbonate be impossible usig a coffee cup calorimeter.
It is possible to determine the ionization energy for hydrogen using the Bohr equation. Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from n=1 to n=∞.
Assuming that the solution volume remains constant at 125mL. find the molarity of the final KBr solution?
phosphoric acid can be prepared by reaction of sulfuric acid with phosphate rock according to the equation ca3po42
calculate the concentrations of h+, oh-, f-, and undissociated hf molecules in 0.10 M hf. Ka for HF is 7.1x10^(-4).
For pyridine at 13.08 K, Cp=4.448 J/(mol*K). Assuming that the Debye formula for the heat capacities of crystals at low temperatures applies to pyridine at temperatures below 13.08 K, calculate the absolute entropy of pyridine at 13.08 K.
The vapor pressure of liquid Ni is 0.100 torr at 1606 degrees C and 1.00 torr at 1805 degrees C. The molar heat of fusion of Ni is 3.25 kcal/mol. Determine the vapor pressure of solid Ni at 1200 degrees C.
What is the pH of the saturated solution of Ca(OH)2 (Ksp = 1.3 x 10-6). 12.14 8.11 11.06 12.37 2. To a 1.00 L solution containing 1.00 x 10-3 mole each of Ca2+, Sr2+, and Ba2+, 0.0100 mole of Na2SO4 solid is added
The change in enthalpy Delta H for a reaction is -39.6 kJ/mol. The equilibrium constant for the reaction is 4.4×103 at 298 K.What is the equilibrium constant for the reaction at 635 K?
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