pentoxide

American

[pen-tok-sahyd] / pɛnˈtɒk saɪd /

noun

Chemistry.

an oxide containing five atoms of oxygen, as phosphorus pentoxide, P 2 O 5 .

pentoxide British

/ pɛntˈɒksaɪd /

noun

an oxide of an element with five atoms of oxygen per molecule

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of pentoxide

1860–65; pent- ( def. ) + oxide

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The phosphorus pentoxide used to produce phosphoric acid for cola soft drinks is prepared by burning phosphorus in oxygen.

From Textbooks • Feb. 14, 2019

The rate constant for the first-order decomposition at 45 °C of dinitrogen pentoxide, N2O5, dissolved in chloroform, CHCl3, is 6.2 10−4 min−1.

From Textbooks • Feb. 14, 2019

Most artificial smokes, Miss Raskin explained, are made of fairly heavy materials such as phosphorus pentoxide or petroleum oils.

From Time Magazine Archive

The oxyfluoride, CbOF3, results when a mixture of the pentoxide and fluorspar is heated in a current of hydrochloric acid.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" by Various

Maleic anhydride is obtained by distilling fumaric acid with phosphorus pentoxide.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023