You react 40-g of Calcium (Ca) with 38-g of Flourine(F). What is the mass of the product? DON'T PUT LINKS YOU WILL GET REPORTED.

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explanation:

since electrons are negative the answer is neagtaive

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.