# Problem: There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (amu)  Relative Size157.8360.2569159.8340.4999161.8320.2431What is the origin of third (mass of 161.832 amu) peak (of what isotopes does each consist)?

###### FREE Expert Solution

We’re being asked to determine the the origin of the third peak (mass = 161.832 amu) given the mass spectrum data of Br2 gas.

Mass Spectrometry allows you to determine the molecular weight of an unknown compound through its vaporization and ionization.

Mass spectrometer is used to determine the mass to charge ratio of an unknown compound

Given:

 Mass (amu) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431
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###### Problem Details
There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks:

 Mass (amu) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431

What is the origin of third (mass of 161.832 amu) peak (of what isotopes does each consist)?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Spectrometry concept. If you need more Mass Spectrometry practice, you can also practice Mass Spectrometry practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Hafensteiner's class at UR.