Chemical Formulas

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the ratio of these elements.

Front

What does H₂O represent?

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H₂O represents water, which consists of two hydrogen atoms and one oxygen atom.

Front

What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is the chemical formula for glucose?

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The chemical formula for glucose is C₆H₁₂O₆.

Front

How many atoms are in the compound C₅H₁₁NO₂S?

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There are 20 atoms in the compound C₅H₁₁NO₂S.

Front

What does the subscript in a chemical formula indicate?

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The subscript in a chemical formula indicates the number of atoms of the element present in the molecule.

Front

What is the chemical formula for carbon dioxide?

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The chemical formula for carbon dioxide is CO₂.

Front

What is the significance of the chemical formula C₆Cl₇HO₄?

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This formula indicates a compound containing 6 carbon atoms, 7 chlorine atoms, 1 hydrogen atom, and 4 oxygen atoms.

Front

What is an example of a compound?

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An example of a compound is sodium chloride (NaCl), which is formed from sodium and chlorine.

Front

What does the term 'molecular formula' mean?

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A molecular formula shows the number and type of atoms in a molecule, but not the arrangement of the atoms.