125. Solving a chemistry problem
6. Boron forms three compounds with chlorine, in which the molar ratio B : Cl is 1:1, 1:2 and 1:3. The molar masses of these compounds are 185.06, 163.43 and 117.17 g/mol, respectively. Set the chemical formulas of the compounds, name them and find the mass fraction (%) of chlorine in each of them.
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