Chemical Reactions Practice Flashcard

Front

What type of chemical reaction is represented by the equation: 2Mg + O2 >>> 2MgO?

Back

Synthesis reaction.

Front

What coefficient is missing in the balanced equation: 2Ni2O3 >>> 4Ni + __O2?

Back

3

Front

What is the term for the substance that is formed in a chemical reaction?

Back

Product.

Front

How is a chemical equation balanced?

Back

By changing or adding coefficients.

Front

According to the Law of Conservation of Mass, what is true about the total mass of the reacting substances and the products?

Back

They are always equal.

Front

What is a chemical reaction?

Back

A process that involves the transformation of substances into new substances.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during the reaction.

Front

What is the difference between a synthesis reaction and a decomposition reaction?

Back

A synthesis reaction combines substances, while a decomposition reaction breaks them down.

Front

What is a coefficient in a chemical equation?

Back

A number placed before a compound to indicate how many molecules are involved.

Front

What is the role of subscripts in a chemical formula?

Back

They indicate the number of atoms of each element in a molecule.