Physics
Physics, 26.06.2019 16:30, ChristLover2863

Why is the atomic mass usually given as an average (and a decimal)?

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Chemistry, 02.07.2019 14:20, Capicus8710
Naturally occurring copper is 69.15% copper-63 (atomic mass = 62.93 amu) and 30.85% of some other isotopic form of copper. what must the atomic mass of this second isotope be in order to account for the 63.55 amu average atomic mass of copper? (write the answer to two decimal places.)
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Chemistry, 29.09.2019 08:00, blazecarley
Elaborate on how the isotopes and their relative abundances affect the average atomic mass of an element. a. average atomic mass comes from the mass of the isotope nucleus and is proportioned by the relative abundances. b. the different masses of isotope electrons gives the relative abundance and average atomic mass of the isotopes. c. isotope mass both varies in neutron numbers and is weighted by its relative abundance to give the average atomic mass. d. when calculating the average atomic mass of the element, the number of protons gives the relative abundance of the isotopes.
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Chemistry, 14.10.2019 12:30, averyeverdeen01
Naturally occurring iron contains: 5.82% 54fe (atomic mass = 53.940 amu) 91.66 % 56fe (atomic mass = 55.935 amu) 2.19% 57fe (atomic mass = 56.935 amu) 0.33% 58fe (atomic mass = 57.933 amu) calculate the average atomic mass of iron.
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