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STALIN [3.7K]
3 years ago
6

Iron(III) oxide is formed when iron combines with oxygen in the air.

Chemistry
1 answer:
Alisiya [41]3 years ago
8 0

Answer:

Mass = 9.58 g  

Explanation:

Given data:

Mass of Fe₂O₃ formed = ?

Mass of Fe = 6.7 g

Solution:

Chemical equation:

4Fe + 3O₂        →    2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/molar mass

Number of moles = 6.7 g/ 55.8 g/mol

Number of moles = 0.12 mol

now we will compare the moles of Fe and Fe₂O₃.

                         Fe         :          Fe₂O₃

                           4         :              2

                         0.12       :          2/4×0.12 = 0.06 mol

Mass of Fe₂O₃:

Mass = number of moles × molar mass

Mass = 0.06 mol  × 159.69 g/mol

Mass = 9.58 g  

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A student needs to prepare 100. mL of 0.612 M Cu(NO3)2 solution. What mass, in grams, of copper(II) nitrate should the student u
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Explanation:

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Now put all the given values in the formula of molarity, we get

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Therefore, the mass of copper (II)nitrate required is 11.5 grams

3 0
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Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance?
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4 0
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Eduardwww [97]

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