Created by StemPy LabAssertion (A): Boron trifluoride reacts with ammonia to form an adduct. Reason (R): The boron atom in boron trifluoride has an incomplete octet and an empty p orbital.
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← A current of 50.0 A is passed through molten alumina until 13.5 g of aluminium forms. For how many hours does it flow? Take F = 96485 C/mol and M(Al) = 26.98 g/mol.An impure sample of boric acid of mass 0.640 g is dissolved in water, mannitol is added, and the mixture is titrated as a monobasic acid with sodium hydroxide. It needs 38.0 mL of solution of concentration 0.250 mol/L. What is the percentage of boric acid in the sample? Take M = 61.83 g/mol. →
More onThe p-Block Elements
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