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Atomic Mass and Atomic Mass Unit. Question. The value of 1 amu is equal to: 1.66 × 10 − 8 g; 1.66 × 10 − 16 g; 1.66 × 10 − 24 g
An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of Carbon-12. The Carbon-12 atom has six protons and six neutrons in its nucleus. In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass.
The IUPAC 1961 definition of the unified atomic mass unit, with that name and symbol "u", was adopted by the International Bureau for Weights and Measures (BIPM) in 1971 as a "non-SI unit accepted for use with the SI".
The atomic mass unit is expressed by considering 1 12 the mass of an oxygen atom. View Solution. Q 5.
The mole is defined as the number of particles in 12 g of carbon − 12, known as 12 C.
It replaces the "atomic mass unit" (without the unified part) and is the mass of one nucleon (either a proton or a neutron) of a neutral carbon-12 atom in its ground state. Technically, the amu is the unit that was based on oxygen-16 until 1961, when it was redefined based on carbon-12.
The mass of a hydrogen is (in amu): Solution. Verified by Toppr. As H atom has one proton only, so the m ass of one H atom =1.66×10−24gm. Also, as we know. 1 amu =1.66×10−24gm. So, the mass of one H atom = 1 amu. Was this answer helpful?
Since Avogadro number is 6.023 × 10 23 and atomic mass of nitrogen is 14 amu, one mole of N 2 gas will have:
Amu is the atomic mass unit and is the standard unit to measure masses of particles such as protons ...
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