How many bond angles of IF7 molecule are 90 degrees?
The molecule of iodine heptafluoride has a bi-pyramidal pentagonal shape. All of the F-I-F angles between two fluorine atoms in axial and equatorial planes are equivalent to 90 degrees. Therefore there is five of them.
Cyanogen bromide is a molecule consisting of three atoms. There is a central carbon atom triple-bonded to a nitrogen on one side and single-bonded to a bromine on the other side. The C-N triple bond consists of one sigma bond and two pi bonds, while the C-Br single bond is one sigma bond. The angle between the two bonds is 180 degrees, making this a linear molecule. The central carbon is sp-hybridized.