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

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.