What never occurs during a chemical reaction?
Matter is never destroyed or created in chemical reactions.
The particles of one substance are rearranged to form a new substance.
The same number of particles that exist before the reaction exist after the reaction..
What happens during a chemical reaction quizlet?
A process in which one or more substances (reactants) are changed into one or more other substances (products). In a chemical reaction, the starting mass of the reactants equals the final mass of all products. Matter is neither created nor destroyed.
What is a chemical reaction explain with an example?
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
What happens during a chemical change examples?
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction.
What is required for a chemical reaction to occur quizlet?
What conditions must exist before a chemical reaction can take place? The reactants particles must come in contact with each other. This contact must occur in such a way that the various particles can bond with each other. Are the properties of reactants the same or different from the properties of the products?