Please help.. I am begging A wave's frequency refers to . *

the number of wavelengths passing by a given point in a period of time

the heigh of a wave as it passes a given point

the length of a wave

the strength of a wave

The length of a wavelength.

Explanation:

"A wave frequency refers to..." The length of a wavelength, or how long the wavelength is.

Hope this helped :)

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.