Question

Select all the statements that correctly describe bond angles in the molecules considered.

A. All the bond angles in SiF₄ are 109.5°.
B. The bond angles in NF₃ are about 109.5°.
C. The bond angle in F₂O is smaller than the bond angles in NF₃.
D. All the bond angles in BCl₃ are 109.5°.

Answer 1

The bond angles in SiF₄, NF₃, and BCl₃ are approximately 109.5°.

Step-by-step explanation:

The correct statements are:

• A. All the bond angles in SiF₄ are 109.5°. SiF₄ has a tetrahedral molecular geometry, so all bond angles are equal and measure 109.5°.
• B. The bond angles in NF₃ are about 109.5°. NF₃ also has a tetrahedral molecular geometry, so all bond angles are equal and measure around 109.5°.
• D. All the bond angles in BCl₃ are 109.5°. BCl₃ has a trigonal planar molecular geometry, so all bond angles are equal and measure 109.5°.

Thus, statements A, B, and D correctly describe the bond angles in the molecules considered.