Chemistry

10th

grade

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Calculate Average Atomic Mass

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10 questions

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  • 1. Multiple Choice
    15 minutes
    1 pt
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    Calculate the average atomic mass of silver.

    106.38649amu

    111.91896amu

    107.8677amu

    121

  • 2. Multiple Choice
    15 minutes
    1 pt
    An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?
    9.012, Beryllium
    12.011, Carbon
    6.941, Lithium
    10.812, Boron
  • 3. Multiple Choice
    15 minutes
    1 pt
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    Compute the average atomic mass for silicon:
    27.977
    28.09
    28.976
    The average mass cannot be determined from provided information.
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