The abundance of copper-63 is 66% and of copper-65, 34% Determine the weighted average atomic mass of copper?

Question

If you could show how you got some of the work I would so greatly apretiate it. Thank you so much for all you do for me, Clint

Answer 1

It is 63 x 0.66 + 65 x 0.34. Do you see why? The actual atomic weight found in the periodic table will differ from this by a tad because of nuclear binding energy.

Answer 2

The atomic mass that they provide on the periodic table is a WEIGHTED common of the countless isotopes of carbon got here across on nature. meaning, if one particular isotope takes place a lot greater suitable than the others, then the burden of that isotope could have greater impact on the final common. that is like if 2000 human beings gave $12 to a charity, and a pair of human beings gave $thirteen, and a pair of greater human beings gave $14, you could locate why you won't say the final donation replaced into $thirteen...the final donation could be $12.011 perchance interior the comparable way, the p.c. abundance (or relative abundance) of carbon-12 is something like ninety 9%, the place as Carbon-thirteen and Carbon-14 the two ensue under one million% each and each in nature. consequently, it make experience that the AMU of the Carbon-12 (12 amu) could have the terrific impact. although, the C-thirteen and C-14 DO exist in very small parts (little or no relative abundance), that's the rationalization Carbon customarily has an atomic mass of fairly bigger than 12, 12.011, to account for the small alterations incurred by utilising C-thirteen and C-14 atoms

Answer 3

(63*.66) + (65*.34) = 41.58 + 22.1 = 63.68

Answer 4

0.66*63+0.34*65=x