When the products of a reaction have less energy than the reactants:

The reaction is exothermic.

The reaction is endothermic.

The reactants lost internal energy.

The change in enthalpy is positive.

What is a precipitate? It is a liquid that forms from solution during a chemical reaction. It is a reactant that forms from solution during a chemical reaction. It is a solid that forms from solution during a chemical reaction.

If you have 8.29 moles of O2 how many moles of H2O can be produced?

Why won't water reform to an ice cube if you freeze it?

Mason compare the properties of two compounds magnesium oxide is an ionic compound and hydrogen peroxide is not an ionic compound there for both compounds most likely

A classmate of yours is allergic to bees and thinks it would be fine if bees went extinct but you believe bees are an important part of our ecosystem.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol

This iron oxide mineral commonly has a reddish color and consistently has red streaks. What mineral is it?

Which of the following transitions would release energy? n=2->n=3 n=1 - > n=3 n=3 - >n=1 n=3->n=2