From the following heats of reaction: 2 H2 (g) + O2 (g) --> 2 H2O (g) ∆H = - 483.6 kJ 3 O2 (g) --> 2 O3 (g) ∆H = +284.6 kJ Calculate the heat of the reaction for: 3 H2 (g) + O3 (g) --> 3 H2O (g)

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

the correct answer to this question is 2