Chemical Reactions

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products, involving the breaking and forming of chemical bonds.

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change during a reaction, found on the left side of a chemical equation.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction, found on the right side of a chemical equation.

Front

How do you determine the number of atoms of an element in a chemical equation?

Back

Count the coefficients and subscripts in the chemical formula for that element.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a coefficient in a chemical equation?

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A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is a subscript in a chemical formula?

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A small number written after an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many atoms of carbon (C) are in the products of a reaction if the equation shows 6CO2?

Back

6 atoms of carbon.

Front

How many atoms of mercury (Hg) are in the reactants if the equation shows 1HgO?

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1 atom of mercury.

Front

How many atoms of hydrogen (H) are in the reactants if the equation shows 6H2O?

Back

12 atoms of hydrogen.