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1
Q:

Which of the following equals one atomic mass unit?

A) one-twelfth the mass of one carbon-12 atom B) the mass of one electron
C) one-sixth the mass of one helium-4 atom D) the mass of one carbon-12 atom

Answer:   A) one-twelfth the mass of one carbon-12 atom



Explanation:

One atomic mass unit (AMU) is equal to the one-twelfth the mass of one carbon-12 atom.

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