6.Calculate H for the reaction 4 NH3 (g) + 5 O2 (g)  4 NO (g) + 6 H2O (g), from the following data.
N2 (g) + O2 (g)  2 NO (g) H = -180.5 kJ
N2 (g) + 3 H2 (g)  2 NH3 (g) H = -91.8 kJ
2 H2 (g) + O2 (g)  2 H2O (g) H = -483.6 kJ

7.Calculate H for the reaction CH4 (g) + NH3 (g)  HCN (g) + 3 H2 (g), given:
N2 (g) + 3 H2 (g)  2 NH3 (g) H = -91.8 kJ
C (s) + 2 H2 (g)  CH4 (g) H = -74.9 kJ
H2 (g) + 2 C (s) + N2 (g)  2 HCN (g) H = +270.3 kJ

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17