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Serhud [2]
3 years ago
9

Nitrogen (N) is made up of 99.632% 14N and 0.368% 15N. The atomic mass of 14N is 14.003 amu. The atomic mass of 15N is 15.000 am

u. What is the average atomic mass of nitrogen?. . A. 14.0 amu. . B. 14.006 amu. . C. 15.00 amu. . D. 15.50 amu.
Chemistry
2 answers:
Mnenie [13.5K]3 years ago
8 0
We calculate as follows:

We first change <span>the percentages to mole fractions by moving the decimal two places to the left. 

</span>N-14 (14.003amu)(0.99632) = 13.9515amu 

<span>N-15 (15.000amu)(0.00368) = 0.0552amu 
</span>
Total = <span>14.0067 amu -------> OPTION B


Hope this answers the question. Have a nice day.

</span>
Rama09 [41]3 years ago
5 0

Answer:

14.006 amu

Explanation:

The other answer has a great explanation so I'm not gonna give any details. I just want to confirm this answer to be correct! :D Good luck on your test!

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