Unit 4 Lesson 1 (short)

Front

What is a Decomposition Reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products. Example: 2Pb(NO3)2 → 2PbO + 4NO2 + O2.

Front

How many atoms of Carbon are in C6H12O6?

Back

There are 6 atoms of Carbon in C6H12O6.

Front

What is a Coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in a reaction to indicate how many molecules or moles of that substance are involved. Example: In 2H2 + O2 → 2H2O, '2' is the coefficient for H2O.

Front

What is a Subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule. Example: In H2O, the '2' is a subscript indicating there are 2 hydrogen atoms.

Front

What is a Synthesis Reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: 2H2 + O2 → 2H2O.

Front

What is a Single Displacement Reaction?

Back

A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: Zn + CuSO4 → ZnSO4 + Cu.

Front

What is a Combustion Reaction?

Back

A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH4 + 2O2 → CO2 + 2H2O.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is a Reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction. Example: In the reaction 2H2 + O2 → 2H2O, H2 and O2 are the reactants.

Front

What is a Product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction. Example: In the reaction 2H2 + O2 → 2H2O, H2O is the product.