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is xef polar or nonpolar
is xef4 polar or nonpolar molecule
is xef2 polar or nonpolar
is xef5- polar or nonpolar
is xef4 polar or nonpolar
xef5 polar or nonpolar
is xef2 polar or nonpolar molecule
xef4 polar or non polar
is xef4 non polar
xef4 is it polar
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