Unit 4 Practice Test

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

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.

Front

What is a double displacement reaction?

Back

A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds.

Front

How do you determine if a chemical equation is balanced?

Back

To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation and ensure they are equal.

Front

What is the formula for calculating the number of atoms in a compound?

Back

The number of atoms in a compound can be calculated by summing the coefficients and subscripts in the chemical formula.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction and are essential for balancing equations.

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.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products.

Front

What is the role of subscripts in a chemical formula?

Back

Subscripts in a chemical formula indicate the number of atoms of each element in a molecule.