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molecular formula
noun
: a chemical formula that gives the total number of atoms of each element in each molecule of a substance compare structural formula
Examples of molecular formula in a Sentence
Recent Examples on the Web
The molecular formula of this detergent is designed to penetrate synthetic materials, to help get — and keep — your activewear clean.
—Elizabeth Marino, Peoplemag, 14 Mar. 2023
Every finite group has a unique molecular formula of this kind — a collection of simple groups from which it is made.
—Quanta Magazine, 22 Sep. 2017
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Word History
First Known Use
1861, in the meaning defined above
Time Traveler
The first known use of molecular formula was
in 1861
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Cite this Entry
“Molecular formula.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecular%20formula. Accessed 24 Dec. 2024.
Kids Definition
molecular formula
noun
: a chemical formula that gives the total number of atoms of each element present in a molecule
Medical Definition
molecular formula
noun
: a chemical formula for a compound existing as discrete molecules that gives the total number of atoms of each element in a molecule
the molecular formula for water is H2O
see structural formula compare empirical formula
More from Merriam-Webster on molecular formula
Britannica.com: Encyclopedia article about molecular formula
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