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April 18, 2014

April 18, 2014

Posted by **Lena** on Saturday, September 8, 2007 at 11:57pm.

For the above question, does this mean I would multiple 85 by .70, 87 by .30, and average those two answers? Thank you!

- Calculating Average Atomic Mass -
**drwls**, Sunday, September 9, 2007 at 5:48amYes; however the answer you get will not be exact since the atomic masses of isotopes 85 and 87 are not exactly 85 and 87. There are small differences due to binding energy (Relativity effects).

- Calculating Average Atomic Mass -
**sul**, Monday, September 24, 2007 at 12:32pm85+87

2

- Calculating Average Atomic Mass -
**RiOtKiDd**, Friday, October 3, 2008 at 9:43amWell i thought to calculate the average atomic mass, you would have to turn the percentages into a decimal and multiply 85 by .70 and 87 by .30 and add them together, there is no need to divide.

- Calculating Average Atomicc Mass -
**Anonymous**, Thursday, December 6, 2012 at 5:11pm58+87

- Calculating Average Atomicc Mass -
**asiya**, Thursday, December 6, 2012 at 5:12pm58+87

- Calculating Average Atomicc Mass -
**asiya**, Thursday, December 6, 2012 at 5:17pmthe terms"average atomic mass is............ Average,and

so is calculate different from a "normal" Average?

- Calculating Average Atomic Mass -
**Tyler**, Tuesday, March 19, 2013 at 6:00pm488.3 repeating

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