When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown. H₂ + I₂ → 2HI

What is the total energy of the reaction? Is this an endothermic or exothermic reaction?

–9 kJ/mol, exothermic

9 kJ/mol, exothermic

9 kJ/mol, endothermic

–9 kJ/mol, endothermic

When you turn on a battery-operated device, an electrical circuit is

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.