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what is the molecular mass nonionic solutes of 8.02 grams of solute in 861 grams of water lower the freezing point to -0.430 c.
How many moles of Barium nitrate must be added to 325mL of 0.20M Iron (III) nitrate to increase the concentration of nitrate ions in the solution to 1.25M.
Calculate the wavelength in nanometers of the spectral line in the visible spectrum of hydrogen for which n1 = 2 and n2 = 3. What color is this line?
The reaction 2NO+Cl2=2NOCl is carried out in a closed vessel. If the partial pressure of NO is decreasing at the rate of 20 torr/min, what is the rate of change of the total pressure of the vessel?
Predict the anode, cathode, and overall cell reactions when an aqueous solution of each of the following salts is electrolyzed in a cell having
What is the percent by mass of NaHCO3 in a solution containing 80 g of NaHCO3 dissolved in 600 mL of H2O?
Calculate the Gibbs free energy (in kJ/mol) at 80 degrees celsius. Assuming that the change in enthalpy is negligible over this temperature range
If 15 grams of copper(2) chloride react with 20grams of sodium nitrate, how much sodium chloride can be formed
An airplane is pressurized to 650 {rm mm,Hg}, which is the atmospheric pressure at a ski resort at 1.30×104 {rm ft} altitude. If the partial pressure of oxygen drops below 100 {rm mm,Hg}, passengers become drowsy.
Assume that no heat is lost to the surroundings or to the coffee cup itself. Assume that the mass of the solution is equal to the mass of the water.
A 890 mL sample of NO2 gas is at STP. If the volume changes to 644 mL and the temperature changes to 20ºC, what will be the new pressure in atmospheres?
What is the second step in the scientific method? 1-to analyze the data, and create a theory to confirm the experimental observations 2- to analyze the data, and propose a tentative hypothesis to explain the experimental observations.
The activation energy for the following first-order reaction is 318 kJ/mol. N2O5(g)-->2NO2(g)+(1/2) O2(g). The value of the rate constant (k) is 6.65x10^-5 s^-1 at 84 degrees C. What is the value of k at 49 degrees C. (R=8.314 J/mol K)?
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