# A pure sample of bromine was vaporized and injected into a mass spectrometer and the data was plotted on the graph below. The mass value for Br-79 is 78 918 amu Find the mass of Br-81.

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## Question:

A pure sample of bromine was vaporized and injected into a mass spectrometer and the data was plotted on the graph below. The mass value for Br-79 is 78 918 amu Find the mass of Br-81.

Explanation:

Hello,

In this case, since the percent abundance of Br-79 is 51.1% and that of the Br-81 is 48.9 %, we can write:

Taking into account that the mass of bromine from the periodic table is 79.909 amu, the mass of Br-81 turns out:

Best regards.

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