Estimating the speed of the proton
A proton in a linear accelerator has a de Broglie wavelength of 138 pm. What is the speed of the proton?
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A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?
The osmotic pressure of this solution is 0.750 atm at 25.0 C. what is the molecular weight of the unknown solute ( R= 0.0821 L.atm/K.mol)?
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to 3.9°C when 4.27 g of the substance is dissolved in the water.
8.5 g of steam at 373 K is added to 305 g of H20 (l) at 310 K at constant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate delta S for the process.
Use the data to determine the heat of vaporization of nitrogen in kJ/mol. Determine the normal boiling point of nitrogen in Kelvin.
If you place 7>50 mg of Xe(CF3)2 into a flask, how long must you wait until only 0.25 mg of Xe(CF3)2 remains?
In the reaction where the potassium chlorate is decomposed into potassium chloride and oxygen. How much oxygen can be made from 45.8g of the potassium chlorate?
The equilibrium constant KP is 158. Analysis shows that the partial pressure of O2 is 0.74 atm at equilibrium. Calculate the pressure of NO and NO2 in the mixture.
What is the volume of 235 mL of a sample of gas at 53.0°C and 740. mm Hg if the conditions are adjusted to STP? Assume the amount of gas is held constant.
A mixture of 2.00 moles of H2, 3.00 moles of MH3, 4.00 moles of CO2, and 5.00 moles of N2 exert a total pressure of 350kPa. What is the partial pressure of each gas?
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