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katrin2010 [14]
3 years ago
14

Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3

Chemistry
1 answer:
Zigmanuir [339]3 years ago
6 0
The answer is B.

First write a balanced equation, which is
4Fe + 3O2 => 2Fe2O3.

Then divide the grams of Fe by the molar mass of Fe (16.7/55.85).

You now know the number of moles of Fe, so perform dimensional analysis.
(.299*2*159.70)/(4*1) = 23.9 g

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True

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Yuri [45]

The mass number of an atom : 26

<h3>Further explanation</h3>

Given

12 protons, 14 neutrons, and 12 electrons

Required

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Solution

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