Average Atomic Mass

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What is Average Atomic Mass?

Back

The weighted average of the masses of an element's isotopes, taking into account their relative abundances.

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How do you calculate Average Atomic Mass?

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Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.

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What is an isotope?

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Atoms of the same element that have the same number of protons but different numbers of neutrons.

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What is the formula for calculating Average Atomic Mass?

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Average Atomic Mass = (mass1 * abundance1) + (mass2 * abundance2) + ...

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If an isotope has a mass of 10 amu and an abundance of 20%, what is its contribution to the average atomic mass?

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2 amu (10 amu * 0.20).

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What is the significance of atomic mass in chemistry?

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It helps in determining the mass of atoms in chemical reactions and compounds.

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How many neutrons are in an isotope?

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Number of neutrons = Atomic mass - Atomic number.

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What does the atomic mass of 1.00794 represent?

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The atomic mass of Hydrogen.

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If an element has isotopes with masses of 75.23 amu (24.1%), 74.61 amu (48.7%), and 75.20 amu (27.2%), what is the average atomic mass?

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74.92 amu.

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What is the atomic mass unit (amu)?

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A standard unit of mass that quantifies mass on an atomic or molecular scale.