Which formulas and their respective names match? i) li3n lithium nitride ii) h2s hydrogen sulfite iii) so2 sulfur dioxide iv) alf3 aluminum trifluoride

the correct options are: (i) and (iii)

Explanation:

The name of the molecule   is lithium nitride.

The name of the molecule is hydrogen sulfide. The hydrogen sulfite is represented by molecular formula of  .

The name of the molecule , is sulfur dioxide.Since, it is a covalent compound prefix will be used in front of an anions while writing the name of the this compound.

The name of the molecule is is aluminium fluorides. It is an ionic compound while writing its name no prefixes will used in front of an anions.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

if they have a finite resultant