pentoxide

American  

[pen-tok-sahyd] / pɛnˈtɒk saɪd /

noun

Chemistry.

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

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pentoxide British  

/ pɛntˈɒksaɪd /

noun

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

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Etymology

Origin of pentoxide

1860–65; pent- ( def. ) + oxide

Example Sentences

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

It is a white powder almost insoluble in water and nitric acid, and when heated, is first converted into metantimonic acid, HSbO3, and then into the pentoxide Sb2O5.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" by Various

When phosphorus burns in an insufficient supply of air the product is partially the trioxide; in oxygen or an excess of air the pentoxide is formed.

From An Elementary Study of Chemistry by McPherson, William