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

Yes i think so not 100 percent sure though

D-no effect on the rate

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water