Question

Each tile can be used more than once, but not all tiles will be used. one or more locations will remain empty. carbonyl sulfide has the chemical formula cos. carbon has four valence electrons, and oxygen and sulfur each have six valence electrons. Complete the Lewis structure for carbonyl sulfide (COS).

a) C-S
b) C=S
c) O=C=S
d) O=C=S with two lone pairs on O

Answer 1

The Lewis structure for carbonyl sulfide is represented as O=C=S with two lone pairs on the oxygen atom. Carbon forms double bonds with both oxygen and sulfur, ensuring all atoms fulfill the octet rule.

Step-by-step explanation:

The student is asking about the correctness of the Lewis structure for carbonyl sulfide (COS), which involves determining the arrangement of electrons around the atoms to represent their bonding and lone pairs. When constructing a Lewis structure for COS, we note that carbon (C) has four valence electrons, while oxygen (O) and sulfur (S) each have six valence electrons. The correct Lewis structure needs to abide by the octet rule, where atoms generally seek to have eight electrons in their valence shell.

Option (d), O=C=S with two lone pairs on O, is the correct Lewis structure for carbonyl sulfide. Here, carbon forms a double bond with oxygen and a double bond with sulfur. Both oxygen and sulfur achieve an octet through these double bonds, and oxygen has two lone pairs of electrons. Additionally, carbon achieves an octet by sharing four of its electrons in the double bonds.