Aclosed container is any container sealed by means of a lid or other device that neither liquid nor vapor will escape from at temperatures.

A closed container is any container sealed by means of a lid or other device that neither liquid nor vapor will escape from at ordinary temperatures. “Ordinary” is the answer, hope this helps! :)

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

You would do 1500/4 and the answer is 375