What is the molecular shape of a CCl4 molecule? A) tetrahedral
B) trigonal planar
C) bent
D) linear

Explanation:

From the question the central atom here that is carbon is bonding with four chlorine atoms therefore it uses it's valence electrons in it's s and p orbitals to bond with the chlorine atoms.

Since the chlorine atoms which is bonding with the carbon atom are four , the carbon atom which is the central atom shows sp³ hybridization , making the shape of the molecule tetrahedral and the bond angle is 109.5°

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c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.