Why does a diamond change directly from a solid state to a gaseous state? a diamond is comprised of only ionic bonds. a diamond is comprised of interspersed ionic and covalent bonds. a diamond is formed from hydrogen bonds. a diamond is hexagonal. a diamond is a network solid formed from carbon.

Diamond  change    directly  from  solid  state  to  gaseous   state  because  diamond  is  a  network  solid  formed  from  carbon

 Diamond   is  a  covalent  solid   which   is  formed  by  network  or  chain  of  carbon  atoms that  are  held  together  by a  covalent  bond.  That  is   each  carbon  atom  that  made  up  diamond  are  connected   to  the  next  by   a     c-c   covalent  bond

Diamond changes directly from a solid state to a gaseous state because diamond is a network solid formed from a carbon. The process of changing directly from solid state to a gaseous state is called sublimation. 
Diamond does not melt at 1 atm. It sublimes to vapor

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Hno3(aq) → h+(aq) + no3−(aq). picture ii best represents the strong acid hno3. strong acids are strong electrolytes