What is the [h3o+] of a solution with a ph of 8.43?

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

What is the main reason why some developing countries fear the increase the free trade policies around the world?

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?