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?
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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?
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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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Answers this question in first person narration, Long essay, simple words if I am planning to have a Career as a Social Worker to become a Probation Officer:
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