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HomeHomework HelpchemistryMolecular Composition

Molecular Composition

Molecular composition refers to the types and numbers of atoms in a molecule, while empirical formulas represent the simplest whole-number ratio of these atoms in a compound.

intermediate
2 hours
Chemistry
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Overview

Molecular composition is a fundamental concept in chemistry that describes the types and numbers of atoms in a molecule. Understanding this composition is essential for deriving empirical formulas, which represent the simplest ratios of these atoms. This knowledge is crucial in various fields, inclu...

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Key Terms

Molecule
A group of atoms bonded together.

Example: Water (H₂O) is a molecule made of two hydrogen atoms and one oxygen atom.

Empirical Formula
The simplest whole-number ratio of atoms in a compound.

Example: The empirical formula of glucose (C₆H₁₂O₆) is CH₂O.

Molecular Formula
A formula that shows the actual number of atoms of each element in a molecule.

Example: The molecular formula of benzene is C₆H₆.

Atomic Mass
The mass of an atom, typically measured in atomic mass units (amu).

Example: The atomic mass of carbon is approximately 12 amu.

Chemical Bond
The force that holds atoms together in a molecule.

Example: Covalent bonds form when atoms share electrons.

Stoichiometry
The calculation of reactants and products in chemical reactions.

Example: Stoichiometry helps determine how much product can be made from given reactants.

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Key Concepts

Molecular StructureEmpirical FormulaChemical CompositionMolecular Weight