Answer:-
The molecular mass of ???? ???? 2 Cl 2 ? (chlorine gas) is determined by adding the atomic masses of two chlorine (Cl) atoms. Each chlorine atom has an approximate atomic mass of 35.5 atomic mass units (amu). So, for ???? ???? 2 Cl 2 ? , the molecular mass is calculated as 35.5 × 2 = 71 35.5×2=71 amu. This value, 71 amu, represents the mass of one molecule of chlorine gas. Chlorine gas exists naturally as ???? ???? 2 Cl 2 ? rather than single Cl atoms, making it diatomic, which is important in chemistry and reactions where precise molecular weights are needed for calculations and experiments.
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