Given the equation representing a reaction at equilibrium: H, (8) +12 (8) +heat = 2H(8)
Which change favors the reverse reaction?
1.
decreasing the concentration of HI(g)
2.
decreasing the temperature
3.
increasing the concentration of 12(9)

Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

1. list three scientific reasons cockroaches may fly.