The value of ΔH° for the reaction below is -72 kJ. Therefore, kJ of heat are released when 2.0 mol of HBr is formed in this reaction.

H2 (g) + Br2 (g) → 2HBr (g) ΔH° = -72 kJ

1. 144
2. 162
3. 72
4. 54
5. 0.44

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate