Convert 5.0 moles NH3 to mass

85 g

Explanation:

molar mass of NH3 = 17 (get individual atom mass from periodic table and add)

to convert moles to grams use dimensional analysis

(5 mol) x (17 g / 1 mol)           basically just do 5 x 17

= 85 :)

the awnser is group 12

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.