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What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
For the following reaction, Kc = 0.513 at 500 K . N2O4(g) 2NO2 (g)
Finding Number of Atoms in a Molecule from Molecular Weight, As determined from the gas law, the molecular weight of a substance is eight times the atomic weight
Given the following data table of average bond enthalpies, estimate the ΔH^rxn for the reactions 2H2+O2-- 2H2O. What is the hybridization of xenon in each of your Lewis resonance structures?
What characteristic absorption bands would you expect to find in the infrared spectrum of caffeine?
calculate the solubility of potassium bromide at 23 degrees celuius.assume that the solubility increases by an equal amount for each degree between 20 and30 degrees
Determine the numerical values of the parameters A, B, and C in the Antoine equation relating vapor pressure of pure substances to temperature using an appropriate linear regression procedure.
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
an ideal gas with temperature independent Cp = (7/2)R at 15 degrees C and having initial volume 60 m^3 is heated at constant pressure (P =0.1013 MPa) to 30 degrees by transfer of heat from a resivoir at 50 degrees C.
Draw the reaction energy diagram for this reaction mechanism. In your diagram, label for each step, Estimate the relative amount of each product that would result. Please show all of your math
A concentrated sulfuric acid solution is 65.0% H2SO4 by mass and has a density of 1.55 g/mL at 20°C. What is the mass of 8.00 L of the concentrated sulfuric acid solution?
A solution is prepared by dissolving 55.1 g of KCl in approximately 75 mL of water and then adding water to a final volume of 125 mL. What is the molarity of KCl(aq) in this solution?
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