Por que um canudo parece torto em um copo d'água?

Why does a straw look bent in a glass of water?

Refraction

Explanation:

A straw looks bent in a glass of water due to the refraction of light as it crosses the air - water boundary.

Refraction is the bending of light rays as it crosses the boundary of one medium to another. The density differences between the medium will determine how the light ray will bend.

it is a good conductor

explanation:

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.