Calculating Average Atomic Mass

Front

What is average atomic mass?

Back

Average atomic mass is 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 from isotopic abundances?

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To calculate average atomic mass, multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.

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What is the formula for calculating average atomic mass?

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

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What is the significance of atomic mass units (amu)?

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Atomic mass units (amu) are a standard unit of mass used to express atomic and molecular weights, where 1 amu is defined as one twelfth of the mass of a carbon-12 atom.

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What does it mean if an isotope is more abundant?

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If an isotope is more abundant, it contributes more significantly to the average atomic mass of the element.

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How do you convert percentage abundance to decimal form?

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To convert percentage abundance to decimal form, divide the percentage by 100.

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What is the average atomic mass of an element with two isotopes: 10.013 amu (19.9% abundance) and 11.01 amu (80.1% abundance)?

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The average atomic mass is 10.812 amu.

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What is the average atomic mass of an element with isotopes of 4 amu (30% abundance), 5 amu (20% abundance), and 3 amu (50% abundance)?

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The average atomic mass is approximately 4 amu.

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What is the average atomic mass of silver?

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The average atomic mass of silver is 107.8677 amu.

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How does the presence of multiple isotopes affect the average atomic mass of an element?

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The presence of multiple isotopes can lead to a weighted average that reflects the relative abundances and masses of each isotope.