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What is the avogadros number used to count the particles of a substance?
Avogadro's number is a constant (6.022 x 10^23) that represents the number of particles (atoms, molecules, ions, etc.) in one mole of a substance. It is used to convert between the mass of a substance and the number of particles it contains.
Why LED is used to determine planks constant?
LEDs (Light Emitting Diodes) are used in determining the Planck constant because they emit light at specific frequencies when electrical current is applied. By measuring the voltage needed to produce light of a known frequency, the relationship between energy and frequency can be studied, allowing for the accurate determination of the Planck constant.
Why is it necessary to determine the cell constant?
Determining the cell constant is necessary because it allows for accurate calibration of the conductivity meter. The cell constant is used to convert the measured electrical conductivity into a value that corresponds to the actual concentration of ions in the solution being tested. Failure to determine the cell constant correctly can lead to inaccurate conductivity readings and incorrect data analysis.
What is the best summary of avogadros law?
Equal amounts of all gases have the same volume at the same conditions.
How do astronomers determine the precession of the earth?
By finding a constant, continuous change in the coordinates of stars every year.
