Question

Which substance listed below is a polar molecule? all of the compounds nh41+ sicl4 cl2o none of the compounds?

Answer 1

A polar molecule has a partial negative and a partial positive charge which makes it have a net dipole. The geometry of the molecule plays a role in determining if it is polar or non-polar. In this case, NH4+ and SiCl4, both have 4 molecules attached to their respective central atoms. This configuration cancels out the possibility of a partial negative/ positive. On the other hand, Cl2O has 2 atoms attached to its central atom and 2 lone pairs, thus, it is nonpolar. 

Answer 2

Answer:

$NH_4^+$ and $SiCl_4$

Explanation:

Hello,

In this case, in order to know whether a molecule is polar or not, the difference between the electronegativities of the bonding elements must be within the rank 0.7 and 1.6. In this manner, such difference is computed as follows for the given compounds:

- $NH_4^+$ --> $\Delta E=3.0-2.1=0.9$

- $SiCl_4$ --> $\Delta E=3.0-1.8=1.2$

- $Cl_2O$ --> $\Delta E=3.5-3.0=0.5$

In such a way, both $NH_4^+$ and $SiCl_4$ are polar molecules unlike $Cl_2O$ which is apolar.

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