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Problem: Select the compound that has bond angles nearest to 120°.A. O=C=SB. CHI3C. H2C=O C. CH4 E. H—C≡C—H

FREE Expert Solution

We’re being asked to identify the molecule with bond angles nearest to 120°.

Electron Regions          Electronic Geometry          Bond Angles

2                                      linear                                    180˚

3                                      trigonal planar                      120˚

4                                      tetrahedral                            109.5˚

5                                      trigonal bipyramidal              90˚, 120˚, and 180˚

6                                      octahedral                            90˚ and 180˚

A. O=C=S

Step 1: The total number of valence electrons present in O = C = S 

            Group            Valence Electrons

C        4A                   1 × 4 e4 e

O        6A                   1 × 6 e6 e

S        6A                   1 × 6 e6 e

Total:  16 valence e

Step 2: Lewis Structure

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Problem Details

Select the compound that has bond angles nearest to 120°.

A. O=C=S


C. H2C=O 

C. CH4 

E. H—C≡C—H

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Bond Angles concept. You can view video lessons to learn Bond Angles. Or if you need more Bond Angles practice, you can also practice Bond Angles practice problems.

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Based on our data, we think this problem is relevant for Professor Cohen-Fray's class at UTOLEDO.