Comparing the reactants and the products of a chemical reaction, which observation can best be used to argue that the reaction is endothermic?(1 point) The volume of the reactants is greater than the volume of the products.

The total energy of the reactants is equal to the total energy of the products.

There are fewer chemical bonds in the reactants than there are chemical bonds in the products.

The temperature of the reactants is greater than the temperature of the products.

Which object is most likely represented by a dot?

The two required components for a generator are

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.