A flask is initially 0.050 M in NO2 and 0.010 M in N2O4. What will the equilibrium concentrations be if K = 0.50 for 2NO2(g) N2O4(g) at the conditions of the flask?

The answer is c. 320 g

Yes it would be a physical change.

Ions gain or lose electrons

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.