Vocab: Empirical and Molecular Formulas

Front

What is Stoichiometry?

Back

The study of the amounts of reactants and products in chemical reactions, often referred to as the study of chemical recipes.

Tags

NGSS.MS-PS1-5

Front

What is a Product in a chemical reaction?

Back

A substance that forms as a result of a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What does the number 4 represent in 4 NH₃?

Back

Coefficient - it indicates the number of molecules of ammonia.

Front

Which pair has the same empirical formula: NaCrO₄ and Na₂Cr₂O₇, or C₂H₄O₂ and C₆H₁₂O₆?

Back

C₂H₄O₂ and C₆H₁₂O₆ have the same empirical formula.

Front

What is a Chemical Reaction?

Back

A process that changes one set of chemicals into another set of chemicals.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Define Empirical Formula.

Back

The simplest whole-number ratio of atoms of each element in a compound.

Front

Define Molecular Formula.

Back

The actual number of atoms of each element in a molecule of a compound.

Tags

NGSS.MS-PS1-1

Front

What is the difference between Empirical and Molecular Formulas?

Back

Empirical formula shows the simplest ratio of elements, while molecular formula shows the actual number of atoms.

Front

What is a Reactant?

Back

A substance that undergoes change in a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a Coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of molecules.

Tags

NGSS.MS-PS1-5