Select THREE examples of pure substances.
a. air
b. a pizza
c. oxygen gas
d. a gold brick
e. a block of ice
f. a glass of salt water

it would be C, D, E

A is a mixture

B is a mixture

C is a pure substance because Oxygen gas by the chemical symbol O2, is strictly pure

D is pure substance because Gold is one of the basic elements found naturally in nature, and as such, in its pure form

E is a pure substance because Both ice and liquid water are the same substance. H2O Though ice water is a mixture of both solid and liquid it is a pure substance, based on the molecular structure of its components .

F is a mixture

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Select THREE examples of pure substances?

a gold brick , oxygen gas, a block of ice

Explanation:

The above mentioned names are all pure substances as they contain no contamination and does not give room to be contaminated

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.