Current convention defines 1 amu as exactly 1/12 the mass of anatom of the isoto

Question

Current convention defines 1 amu as exactly 1/12 the mass of anatom of the isotope 12C. Since most elements occurnaturally in well-established fixed relative abundances ofdifferent isotopes, the so-called Atomic Mass for aparticular element represents a weighted average of the masses ofthe individual isotopes. For example, naturally occuring carbon isa mixture of 98.90% 12C (12.000000 amu) and 1.10%13C (13.003355 amu) plus a trace of 14C(14.003241 amu). The Atomic Mass of carbon is found to be12.011 amu.
A Molecular Mass is the sum of the (averaged) AtomicMasses for all atoms in a molecule. What is the Molecular Mass ofH3PO3 answers should be in amu H3PO3 is 81.99 g aren't i suppose to just times with 6.022E23? please let meknow i'll rate lifesavior What is the Molecular Mass ofH3PO3 answers should be in amu H3PO3 is 81.99 g aren't i suppose to just times with 6.022E23? please let meknow i'll rate lifesavior answers should be in amu H3PO3 is 81.99 g aren't i suppose to just times with 6.022E23? please let meknow i'll rate lifesavior Current convention defines 1 amu as exactly 1/12 the mass of anatom of the isotope 12C. Since most elements occurnaturally in well-established fixed relative abundances ofdifferent isotopes, the so-called Atomic Mass for aparticular element represents a weighted average of the masses ofthe individual isotopes. For example, naturally occuring carbon isa mixture of 98.90% 12C (12.000000 amu) and 1.10%13C (13.003355 amu) plus a trace of 14C(14.003241 amu). The Atomic Mass of carbon is found to be12.011 amu.
A Molecular Mass is the sum of the (averaged) AtomicMasses for all atoms in a molecule.

Explanation / Answer

Molar mass of H3PO3 = 3*H + P + 3*O                                     = 3(1.008 amu) + 30.97 amu + 3(16.00 amu)                                     = (3.024 + 30.97 + 48.00) amu                                     = 81.994 amu                                     ˜ 81.99 amu

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