The element copper has naturally occuring isotopes with mass numbers of 63 and 65. The relative abundance atomic masses are 69.2% for mass=62.93 amu, and 30.8% for mass=64.93 amu. Calculate the average atomic mass of copper.

(0.692*62.93) + (0.308*64.93) =

avgMass= .692*62.93+.308*64.93

check my thinking.

23. The element copper has natu rally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% for mass 62.93 amu, and 30.8% for mass 64.93 amu. Calcu late the average atomic mass of copper.

To calculate the average atomic mass of copper, we will utilize the relative abundance information given for its isotopes.

Step 1: Convert the relative abundance percentages to decimal form.

69.2% becomes 0.692 (for isotope with mass number 63).
30.8% becomes 0.308 (for isotope with mass number 65).

Step 2: Multiply each isotope's mass number by its relative abundance.

For the isotope with mass number 63:
Mass number (63) * Relative abundance (0.692) = 43.296 amu

For the isotope with mass number 65:
Mass number (65) * Relative abundance (0.308) = 20.02 amu

Step 3: Sum up the results from Step 2.

43.296 amu + 20.02 amu = 63.316 amu

The average atomic mass of copper is 63.316 amu.