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How it can prove that 1 amu is equal to 1.66067x10-27?
From Wikipedia: "... It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 ..." Thus, to prove that it has a certain mass, you would have to carry out exact measurements of the mass of carbon-12 atoms.
What is the difference between atomic mass and relative atomic mass?
Atomic mass is the measure of a mass of one atom in relation to 1/12 mass of Carbon 12 atom and measured in atomic mass unit(amu) or Dalton unit or grams/mol.Relative atomic mass is also the relative mass but does not have a unit but a ratio number.
An atomic mass unit is equal to?
One-twelfth the mass of a carbon-12 atom or 1,660538921(73)×10−27 kg.
How do you measure one second?
With a stop watch or a clock. If you're asking how do we determine what a second is (In the SI- International system of units), then that is determined by the oscillation of a Cesium Atom's Microwave. No matter what the conditions, the cesium atom's full oscillation will always equal one second. No matter where in the world. Really neat phenomenon.
Does one eighth equal 0.25?
No - one eighth is equal to 0.125. 0.25 is equal to one quarter.
