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Chemistry 7 Online
OpenStudy (anonymous):

Nitrogen has 2 naturally occurring isotopes: N-14 and N-15. Bromine-79 and Bromine-81.how many NBr3 molecules of different masses can exist?

OpenStudy (4n1m0s1ty):

Just consider all possibilities: N-14 with Br-79,Br-79,Br-79 N-14 with Br-81,Br-79,Br-79 N-14 with Br-81,Br-81,Br-79 N-14 with Br-81,Br-81,Br-81 N-15 with Br-79,Br-79,Br-79 N-15 with Br-81,Br-79,Br-79 N-15 with Br-81,Br-81,Br-79 N-15 with Br-81,Br-81,Br-81

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