Calculate Average Atomic Mass

Front

Calculate the average atomic mass of silver.

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107.8677amu

Front

An element has two naturally occurring isotopes: 10.013 amu (19.9% abundant) and 11.01 amu (80.1% abundant). What is the average atomic mass? What element is it?

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10.812, Boron

Front

Compute the average atomic mass for silicon.

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28.09

Front

An isotope has three forms. 30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu. Average atomic mass will be closest to

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4 amu

Front

24.1% of all the isotopes of an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu. What is the average mass of this element?

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74.92 amu

Front

Average atomic mass of atom X given: 4.35% of X atoms = 39.946 amu, 83.79% = 41.941 amu, 9.50% = 42.941 amu, 2.36% = 43.939 amu.

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41.97 amu

Front

Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?

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24.31

Front

Calculate the average atomic mass of naturally occurring chlorine: 75.53% 35Cl (mass = 34.969 amu) and 24.47% 37Cl (mass = 36.966 amu).

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35.46 amu

Front

Calculate the average atomic mass of an element with the following isotopic composition: 4.35% at 49.9461 amu, 83.79% at 51.9405 amu, 9.50% at 52.9407 amu, and 2.36% at 53.9389 amu.

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51.99 amu

Front

Calculate the average atomic mass of an element with the following isotopic composition: 4.35% at 49.9461 amu, 83.79% at 51.9405 amu, 9.50% at 52.9407 amu, and 2.36% at 53.9389 amu.

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51.99 amu