Given the following reactions, what is the overall enthalpy change for the following reaction? NH3(g) + HCl(g)  NH4Cl(s) Reaction H° (kJ) N2(g) + 3 H2(g)  2 NH3(g) –92 H2(g) + Cl2(g)  2 HCl(g) –185 N2(g) + 4 H2(g) + Cl2(g)  2 NH4Cl(s) –629

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

Condensation happens when water vapor cools. true or false? ?

Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.