Some people use disposable hand warmers to stay comfortable on cold days. A hand warmer is a small pouch that contains powdered iron (Fe), as well as salt and water. When the hand warmer is removed from its packaging, oxygen gas (O2) drifts through small holes in the material of the pouch. In the presence of the salt and water, the oxygen quickly reacts with the iron powder to form ferric oxide (Fe2O3). As the reaction occurs, the temperature of the pouch increases.

which statement is true

Exothermic

Endothermic

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.