Sodium borohydride, nabh4, and boron trifluoride, bf3, are compounds of boron. what are the shapes around boron in the borohydride ion and in boron trifluoride?

The shape of boron in borohydride ion is tetrahedral and in boron trifluoride is trigonal planar.

Explanation: Formula used

where, V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

1.

The number of electron pairs is 4 that means the hybridization will be and the electronic geometry of the molecule will be tetrahedral.

2.

The number of electron pairs is 3 that means the hybridization will be and the electronic geometry of the molecule will be trigonal planar.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.