The average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu) is 12.01 (2 decimal places).
An average atomic mass unit is defined as correctly 1/12 the mass of a carbon-12 atom. The carbon-12 atom has six neutrons and six protons in its nucleus. it is represented as a.m.u. 1 a.m.u is common of the proton relaxation mass and the neutron relaxation mass.
An atomic mass unit is described as a mass same to at least one 12th of the mass of an atom of carbon-12. The mass of any isotope of any element is expressed when it comes to the carbon-12 fashionable. as instance, one atom of helium-4 has a mass of four.0026 amu. and five extra users observed this solution helpful. heart outlined.
m(¹²C) = 12.00 amu, the average atomic mass of carbon-12.
m(¹³C) = 13.003354 amu, the average atomic mass of carbon-13.
ω(¹²C) = 98.90% ÷ 100% = 0.989; fractional abudance of carbon-12.
ω(¹³C) = 1.100% ÷ 100% = 0.011; fractional abudance of carbon-13.
m(C) = m(¹²C) · ω(¹²C) + m(¹³C) · ω(¹³C).
=(0.989⋅12)+(0.011⋅13.003354)=12.011036894
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