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A student performs a calorimeter calibration using an electric heater. When a voltage of 30 V is applied to the heater for 3.0 min, a constant current of 2.5 A is observed. The calorimeter temperature increases from 20.00C to 25.59C. Calculate C_bomb for the calorimeter. Assume 2000.0 g of water in the bucket.
The rate constant (k) for a reaction was measured as a function of temperature. a plot of ln k versus 1/T is line and has a slope of -7445K. Calculate the activation energy for the reaction
If the absorbance of one of your samples is off scale, what is the most likely problem?
Which of the following will have the lowest freezing point?
For the following pairs of orbitals, indicate which orbital is lower in energy, and give a brief explanation why. a) sulfur 3p vs. sulfur 3d
Determine the concentration of the total available acid of the apple juice express your answer in moles/L?
Calculate the pH during the titration of 24.8 mL of 0.793 M HBr(aq) with 0.219 M KOH(aq) after 14.1 mL of the base have been added.
The free energy change of the conversion of tasmainium to bulgarium was - 60 kcal and the enthalpy of the reaction was determined to be - 9.2kcal.
What volume of a 35.0 mM solution of propionic acid is required to supply
If you were to perform this reaction in a lab, you would make far less than the theoretical yield of product due to a wide range of outside factors. We can compare the actual yield to the theoretical yield to calculate the percent yield:
A room contains 47kg of air. How many kilowatt-hours of energy are necessary to heat the air in the house from 7 degrees celsius to 26 degrees celsius
249g of ice at 265K is mixed with 101g of water at 304K. Calculate the final temperature of the mixture. Assume that no energy in the form of heat is transferred to the environment
Add electron pairs to show the bonds between the atoms. Assigning the remaining valence electrons so that each atom has an octet of electrons, write the Lewis structure for COCl2 in the box.
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