Vocab: Empirical and Molecular Formulas

A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

• Coefficient

• Subscript

• Reactant

• Product

Tags

NGSS.MS-PS1-5

A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound

• Coefficient

• Subscript

• Reactant

• Product

Tags

NGSS.MS-PS1-1

A formula that shows the smallest whole-number mole ratio of the elements of a compound, and may or may not be the same as the actual molecular formula.

• Empirical Formula

• Molecular Formula

• Stoichiometry

• Chemical Reaction

Tags

NGSS.MS-PS1-1

Gives the actual number of atoms of each element in a molecule of a compound.

• Empirical Formula

• Molecular Formula

• Stoichiometry

• Chemical Reaction

Tags

NGSS.MS-PS1-1

The study of the amounts of reactants and products in chemical reactions(the study of chemical recipes)

• Empirical Formula

• Molecular Formula

• Stoichiometry

• Chemical Reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

A substance made up of atoms of two or more different elements joined by chemical bonds

• Product

• Compound

• Stoichiometry

• Chemical Reaction

Tags

NGSS.MS-PS1-1

A chemical substance that is present at the start of a chemical reaction

• Product

• Compound

• Reactant

• Coefficient

Tags

NGSS.MS-PS1-5

A substance that forms in a chemical reaction

• Product

• Compound

• Reactant

• Coefficient

Tags

NGSS.MS-LS1-7

Process that changes one set of chemicals into another set of chemicals

• Empirical Formula

• Molecular Formula

• Stoichiometry

• Chemical Reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which pair has the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇
• C₂H₄O₂ and C₆H₁₂O₆
• C₃H₆O₃ and C₂H₆O₂
• CH₄ and C₂H₆

Tags

NGSS.MS-PS1-1