Chemistry Formulas and Concepts

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What is a Molecular Formula?

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Displays the exact number of atoms of each element in a compound (e.g., C₂H₆ for ethane).

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What is a Structural Formula?

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Shows the actual arrangement of atoms in a molecule, often including bond connections (e.g., the Lewis structure for C₂H₆).

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What is a Condensed Formula?

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Simplifies the structural formula by grouping similar atoms (e.g., CH₃CH₃ for ethane).

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What is an Empirical Formula?

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Represents the simplest whole-number ratio of atoms in a compound (e.g., CH₃ for C₂H₆).

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What is Avogadro’s Number?

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6.022×10²³ particles per mole, used for counting atoms, ions, or molecules in a substance.

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What does the mole represent?

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A unit that represents a fixed number of particles, helping in conversion between atomic-scale units and grams.

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How many atoms or molecules are in 1 mole?

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1 mole of any element or compound contains 6.022×10²³ atoms or molecules.

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What is the purpose of molar mass?

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Helps translate moles into grams for practical laboratory measurements.

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What is the empirical formula of formaldehyde?

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CH₂O, representing the simplest ratio of elements.

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What is the difference between empirical and molecular formulas?

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Empirical shows the simplest ratio, while molecular shows the exact number of each atom.