jennakaveney1 jennakaveney1

10-02-2017
Biology

contestada

the air we breathe contains different individuel gases(mostly nitrogean and oxygen) which of the following to we breathe in the below and element or a compound or a mixture

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rose119 rose119

10-02-2017

oxygen is an electronic which can be defined as pure substance..we breath in oxygen and breath out carbon dioxide

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