How did Becquerel's results allow him to conclude that something other than phosphorescence was
causing the film to darken?
His results showed that uranium not exposed to light still produced the same effect as uranium
exposed to light.
His results showed that any rock will darken film
His results showed that only uranium exposed to light produced the darkening effect on the film,

The teacher is mostly talking about the distillation of a mixture

Ibelieve its because the stove is a cleaner burning fuel

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

The answer is a. mars