Calculate the percent ionization of nitrous acid in a solution that is 0.210 m in nitrous acid (hno2) and 0.290 m in potassium nitrite (kno2). the acid dissociation constant of nitrous acid is 4.50 ⋅ 10-4.

257 grams h2o i think

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.

The answers to this question are as following: -increase the sample size from 6 cups to 12 cups of sand and water.-use more precise digital thermometers-use more precise scales that measure to the hundredth of a gram