Unit 6 Mastery Test

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances with new chemical properties, often indicated by changes such as color, temperature, or the formation of a precipitate.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and separates from a liquid mixture during a chemical reaction.

Front

What are coefficients in a chemical equation?

Back

Coefficients are numbers placed before compounds in a chemical equation to indicate the number of moles of each substance involved in the reaction.

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What are subscripts in a chemical formula?

Back

Subscripts are numbers written below and to the right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule.

Front

What is the difference between coefficients and subscripts?

Back

Coefficients indicate the number of molecules or moles, while subscripts indicate the number of atoms of an element in a molecule.

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat.

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 substance.

Front

What is a decomposition reaction?

Back

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