Copper used in electric wires comes in two flavors (isotopes): 63Cu and 65Cu. 63Cu has an atomic mass of 62.9298 amu and an abundance of 69.09%. The other isotope, 65Cu, has an abundance of 30.91%. The average atomic mass between these two isotopes is 63.546 amu. Calculate the actual atomic mass of 65Cu. (Your answer should have 4 places after the decimal.)

(62.9298*0.6909)+(x*0.3091) = 63.546

Solve for x.

64.94 amu

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To calculate the actual atomic mass of 65Cu, we can use the following formula:

(actual atomic mass of 65Cu) = (average atomic mass) - (mass of 63Cu x abundance of 63Cu)

Let's plug in the values:

average atomic mass = 63.546 amu
mass of 63Cu = 62.9298 amu
abundance of 63Cu = 69.09%

(actual atomic mass of 65Cu) = 63.546 amu - (62.9298 amu x 0.6909)

Now, let's calculate:

(actual atomic mass of 65Cu) = 63.546 amu - 43.49092942 amu

(actual atomic mass of 65Cu) = 20.05507058 amu

Rounded to 4 decimal places, the actual atomic mass of 65Cu is 20.0551 amu.

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