Which statement best describes the use of a catalyst in a fuel cell? It reduces waste. It lowers energy requirements. It reduces toxic exhaust. It increases reaction rates.

Observe the reactions given below. Classify the reactants based on whether they are oxidized or reduced. Zn (s) + Cu2 + (aq) →Zn2 + (aq) + Cu (s) 3Fe (s) + 4H2O (g) →Fe2O3 (s) + 4H2 (g) Drag the appropriate items to their respective bins.

Which phrase provides the best definition of mass movement

How many moles of water are in 24.3 grams of water?

Is 3Fe + 4H20 → Fe3O4 + 4H2 a balanced chemical reaction?

A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep constant pressure on the mixture of 1 atm.

What are two fungal skin infections that humans can contract? pneumonia and ergot disease ergot disease and athlete's foot athlete's foot and ringworm ringworm and pneumonia

A critical biotic factor in Yellowstone National Park is A) geographic isolation B) high elevation C) high temperature in the summer D) population of wolves E) proximity to water

If energy can neither be created nor destroyed in a chemical reaction, what can happen to the energy

Effect of ph on conformation of aplha helix

How can we tell when something is polar or non-polar in an Inter-molecular Force?