5 Um vidro contém 300 cm3 de mercúrio de densidade 13 g/cm3. Qual é massa de mercúrio contido no vidro?

130

Explanation:

This is because I just took the test and it said this was the answer

i'm pretty sure its b i might be wrong though!

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.