Calculate the wavelength of the electron
A scanning electron microscope operating at an accelerating voltage of 10 kV accelerates electrons to 20% of the speed of light, calculate the wavelength of the electron.
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A cylinder containing 23.5 moles of nitrogen gas has a volume of 9.81L. What is the pressure of the gas at 23°C?
Would the calculated value of k, the true rate constant, be in error if the concentration of dye was actually doubled the value you were told? Explain your answer.
Calculate the volume (in mL) of a 1.22 M Na2S solution needed to react with 2.75 g of AlBr3 (molar mass = 266.7 g/mol) in the following reaction:
Question: An unknown mass of each of the following substances, initially at 24.0 C, absorbs 1920 J of heat. The final temperature is recorded as indicated. Find the mass of each substance.
At 298 K a cell reaction has a standard emf of +0.17 V. The equilibrium constant for the cell reaction is 5.5 105. What is the value of n for the cell reaction?
The solubility product for cerium(III) fluoride is 8.0 x 10^-16 (A) what is the molar solubility of Cerium (III) Fluoride in water?
Rhenium-186 is a ß-emitter with a half-life of 90.0 hours. How long would it take for the activity in a sample of this isotope to decay to exactly one-third of its original value?
If the half-life of a radioactive element is 30.0 years, how long will it take for a sample to decay to the point where its activity is 70.0% of the original value?
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