Boron and hydrogen form an extensive family of compounds, and the diagram below shows how they are related by reaction.

The following table gives the weight percent of boron in each of the compounds. Derive the empirical and molecular formulas of compounds A−E.

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B 100 °C 200 °C D 180 °C + H₂ at 60 °C 100 °C A 120 °C 120 °C 95 °C C 25 °C E