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Rainbow [258]
3 years ago
13

Covalent bonds usually occur between atoms that have and . A. High molecular weights; large atomic radii B. Low ionization energ

ies; low electron affinities C. Low molecular weights; small atomic radii D. High ionization energies; high electron affinities
Chemistry
1 answer:
Katen [24]3 years ago
8 0

Answer is: D. High ionization energies; high electron affinities.

Covalent bond is usually between nonmetals.

The ionization energy (Ei) is the minimum amount of energy required to remove the valence electron, when element lose  electrons, oxidation number of element grows (oxidation process).

Nonmetals are far right in the main group and they have highest ionization energy, because they have many valence electrons.

For example, fluorine has the greatest affinity for electrons and tendency to be reduced, than oxygen and chlorine.

Fluorine form molecule of fluorine F₂ with single nonpolar covalent bond.

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<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

Mole ratio is defined as the ratio between the stoichiometric coefficients of the molecules present in the chemical reaction.

For the given balanced chemical equation:

3Fe+4H_2O\rightarrow Fe_3O_4+4H_2

By Stoichiometry of the reaction:

3 moles of iron metal reacts with 4 moles of water to produce 1 mole of iron oxide and 4 moles of hydrogen gas.

The mole ratio of Fe_3O_4:Fe=1:3

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