Is the molecule polar?
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
Water's dipole moment is 1.857 D and HCl's is 1.093 D. How many times larger is water's, to 0.01, Ari?
Ammonia's dipole moment is 1.476 D and CO's is 0.112 D. How many times larger is ammonia's, to 0.01, Bo?
HF's dipole moment is 1.827 D and HCl's is 1.093 D. How many times larger is HF's, to 0.01, Esme?
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Measured dipole moments (NIST CCCBDB) (NIST CCCBDB)
molecule dipole moment (D) H₂O 1.857 HF 1.827 NH₃ 1.476 HCl 1.093 CO 0.112 CO₂ 0 CH₄ 0 Using the table, which two molecules are nonpolar, Jun?
- NH₃ and CO
- CO₂ and CH₄
- H₂O and HF
CO₂ and H₂O both have polar bonds. Why is only H₂O polar, Milo?
- Water is heavier
- Water is bent; CO₂ is linear
- Water's bonds are polar; CO₂'s aren't
BF₃ has polar B–F bonds in a flat triangle. Is it polar, Noah?
- Yes: fluorine is heavy
- No: the three dipoles cancel
- Yes: its bonds are polar, so it is
Why is NH₃ polar while BF₃ isn't, Pia?
- NH₃ has more atoms than BF₃ does
- NH₃'s pyramid doesn't cancel
- BF₃ has no bonds
In a described demo, a thin water stream bends toward a charged comb. Why, Ren?
- The comb is wet
- Water molecules are polar
- Water is magnetic and attracted
Why do oil and water separate into layers, Tala?
- Water is polar; oil is nonpolar
- Both are polar
- Oil is heavier than water
Why does sugar dissolve well in water, Zee?
- Water is nonpolar
- Both are polar
- Sugar is a metal