Copper has an isotope with an atomic mass of 62.93 and an abundance of 69.17%. a second isotope has an atomic mass of 64.93 and an abundance of 30.83%. what is the average atomic mass for copper?

English Chemistry
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copper has an isotope with an atomic mass of 62.93 and an abundance of 69.17%. a second isotope has an atomic mass of 64.93 and an abundance of 30.83%. what is the average atomic mass for copper?

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copper has an isotope with an atomic mass of 62.93 and an abundance of 69.17%. a second isotope has an atomic mass of 64.93 and an abundance of 30.83%. what is the average atomic mass for copper?

Answer: To calculate the average atomic mass of copper (Cu), you can use the following formula:

Average Atomic Mass = (Isotope1 Mass x Isotope1 Abundance) + (Isotope2 Mass x Isotope2 Abundance)

Given the information:

  • Isotope 1 has a mass of 62.93 and an abundance of 69.17% (0.6917).
  • Isotope 2 has a mass of 64.93 and an abundance of 30.83% (0.3083).

Now, plug these values into the formula:

Average Atomic Mass = (62.93 u x 0.6917) + (64.93 u x 0.3083)

Average Atomic Mass = (43.53 u) + (20.02 u)

Average Atomic Mass = 63.55 u

So, the average atomic mass of copper is approximately 63.55 atomic mass units (u).