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zzz [600]
3 years ago
14

The element oxygen, represented by the symbol O, is classified as

Chemistry
2 answers:
nika2105 [10]3 years ago
7 0

Answer:

A.  

a pure substance.

Explanation:

Pure Substances are made of the same material throughout and have the same properties throughout. Pure substances cannot be separated into other substances. Some examples are carbon, iron, water, sugar, salt, nitrogen gas, and oxygen gas. Ur welcome.

Katarina [22]3 years ago
3 0
Oxygen<span> is a </span>chemical element<span> having a symbol </span>O<span> and having an </span>atomic number<span> 8.
Oxygen is a pure substance , and it is not a mixture or solution, Niether it is a compound ... Instead , it forms chemical compounds by reacting with other elements.
So , according to above explanation ,
A. A pure substance , is the correct answer.</span>
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1) The bubbles will grow, and more may appear.

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3 years ago
The following thermochemical equation is for the reaction of Fe 3 O 4 (s) with hydrogen (g) to form iron and water vapor Fe 3 O
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Answer:

41.3kJ of heat is absorbed

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63.4g Fe₃O₄ × (1mol / 231.533g) = <em>0.274moles of Fe₃O₄</em>

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0.274moles of Fe₃O₄ × (151kJ / 1 mole Fe₃O₄) =

<h3>41.3kJ of heat is absorbed</h3>

<em />

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3 years ago
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