Why is ammonia (NH₃) classified as a polar molecule? (4 Points)

Ammonia molecules dissolve in mineral oil.

N-H bonds are non-polar.

Nitrogen and hydrogen are both non-metals.

Ammonia contains an asymmetrical distribution of electric charge.

Ammonia contains an asymmetrical distribution of electric charge.

Explanation:

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In this case, accordingly to the electronegativity difference we can calculate for the N-H bond, and based off our periodic table, which shows an electronegativity of 3.0 and 2.1 for N and H respectively, we obtain:

Which is within the range of polar molecule even the both of them are nonmetals. Thus, choices a and b are firstly discarded; nonetheless, even when they are both nonmetals, two of these elements usually have a nonpolar bond, which means that option C is discarded, and therefore, our answer is ammonia contains an asymmetrical distribution of electric charge.

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