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Express the concentration of a 0.0860 M aqueous solution of fluoride, F-, in mass percentage and in parts per million (ppm). Assume the density of the solution is 1.00 g/mL.
How many molecules of ice at 0 degrees celsius can be melted from the complete transfer of the heat involved when 25.6 Grams of nitrogen is reacted with 34.5 L Of hydrogen gas at STP.
Anfinsen studied the folding properties of the enzyme ribonuclease using the denaturants 2-mercaptoethanol and urea. How does each of these materials contribute to the unfolding of the protein,
A balloon holds 2.5 liters of helium at a temperature of 25C and 1 atmosphere of pressure. What volume will the balloon have after it rises to where the atmospheric pressure is 0.8 atmosphere and the temperature is -10C
How much heat is absorbed when 45.00 g of C(s) reacts in the pressence of excess SO2(g) to produce CS2(l) and CO(g) according to the following chemical equation?
the change in energy of each system and also of the composite system. the change in entropy of each system an also of the composite system.
A 21.15 g piece of iron and a 25.05 g piece of gold at 100.0 degreesC were dropped into a 720.0 mL of water at 18.45 degreesC.
provide the structures for the two products indicate two features of the spectrum (ie hydrogen ratio, peaks, classification of peak (singlet doublet etc) that would justify assigning the structure.
What chemical test might be used to distinguidh between pentanal and 2-pentanone? Between benzyl alcohol
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol
Determine the molar mass of carbon dioxide by measuring the mass of an Erlenmeyer flask full of the gas. The following calculations are intended to familiarize you with the general procedure:
-Determining the molar enthalpy/heat of a reaction, and then how much heat was actually given off in a specific reaction -Finding the increase in temperature of a substance given its gain or loss of heat energy
At 25 degrees Celsius the rate constant for the decomposition of a pesticide solution is 6.40e-3 min-1. If the starting concentration of pesticide is 0.0314M, what concentration will remain after 62.0min at 25 degrees Celsius
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