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2 years ago

The following data was collected when a reaction was performed experimentally in the laboratory.

Chemistry

1 answer:

Lera25 [3.4K]2 years ago

3 0

Answer:

Mass = 279.23 g

Explanation:

Given data:

Number of moles of Fe₂O₃ = 3 mol

Number of moles of Al = 5 mol

Maximum amount of iron produced by reaction = ?

Solution:

Chemical equation:

Fe₂O₃ + 2Al → Al₂O₃ + 2Fe

Now we will compare the moles of iron with Al and iron oxide.

Fe₂O₃ : Fe

1 : 2

3 : 2×3 = 6 mol

Al : Fe

2 : 2

5 : 5 mol

The number of moles of iron produced by Al are less so Al is limiting reacting and it will limit the amount of iron so maximum number of iron produced are 5 moles.

Mass of iron:

Mass = number of moles × molar mass

Mass = 5 mol × 55.845 g/mol

Mass = 279.23 g

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Effective nuclear charge, Zeff, is defined as:

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Answer:

The effective nuclear charge for a valence electron in oxygen atom: $Z_{eff} = 4.55$

Explanation:

Effective nuclear charge $[Z_{eff}]$ is the net nuclear charge experienced by the electron in a given atom. It is always less than the actual charge of the nucleus [Z], due to shielding by electrons in the inner shells.

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