One atomic mass unit is defined as a mass exactly equal to: — Chemistry | Mockzy

EasyChemistryBasic Moles

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One atomic mass unit is defined as a mass exactly equal to:

one twelfth of the mass of one carbon-14 atom.

one twelfth of the mass of one carbon-12 atom.

one sixth of the mass of one carbon-12 atom.

one twelfth of the mass of one carbon-13 atom.

The mass of one ammonia (NH3) molecule is:

Formula mass is used instead of molecular mass for:

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