When naming ionic compounds does the roman numeral after the metal cation tell you how many anions will be there?

no

Explanation:

the roman numeral tells you that the metal is a transition metals. transition metals have more than one oxidation state.

the maximum mass of nh3 is nh3 in grams

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.