Plz help! Which of the following steps can be used to identify a double replacement reaction?

Check whether the products are salt and water.
Check whether the reactants are an acid and a base.
Check if the ions of two compounds exchange places.
Check if one element replaces another element in a compound.

Where can i find naap lab answers sheet/key?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.