Answer:-
Bromine (Br) has two common isotopes: Br-79 and Br-81, while chlorine (Cl) has two: Cl-35 and Cl-37. These combine to form four different BrCl molecules with different masses: Br-79 + Cl-35 = 114 amu Br-79 + Cl-37 = 116 amu Br-81 + Cl-35 = 116 amu Br-81 + Cl-37 = 118 amu Each mass is calculated by adding the atomic masses of one bromine and one chlorine isotope. These variations exist because of natural isotope distributions.
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