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Vinil7 [7]
3 years ago
13

How many valence electrons would atoms of the element boron have?

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
8 0

Answer:

3 valence electrons

Explanation:

Atoms of Boron have 3 valence electrons

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Answer:

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Explanation:

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3 years ago
7.0 mol Mn reacts with 5.0 mol
Elenna [48]

The moles of MnO formed with the reaction of 5 moles of Mn is 3 moles.

<h3>What is a limiting reagent?</h3><h3 />

In a chemical reaction, the reagent that is present in a lesser quantity and governs the rate of the reaction is termed as the limiting reagent.

In the reaction of the formation of MnO, according to the stoichiometric law 2 moles of Mn reacts with 1 moles of Oxygen.

Thus, the moles of oxygen consumed by 7 moles of Mn is:

2 moles Mn = 1 mole O₂

7 moles Mn = 3.5 moles O₂

The available moles of O₂ = 5 mol.

The remaining moles of O₂ = 5-3.5 moles

The remaining moles of O₂ = 1.5 moles

The reaction of 5 moles Mn requires 2.5 moles of O₂, whereas the available moles of oxygen is 1.5 moles. Thus, oxygen serves as the limiting reagent.

The moles of MnO formed with the reaction of 5 moles Mn and 1.5 moles O₂

1 mole O₂ = 2 moles MnO

1.5 moles O₂ = 2 * 1.5 moles MnO

1.5 moles O₂ = 3 moles MnO

Thus, the moles of MnO formed with the reaction of 5 moles of Mn with the available oxygen is 3 moles.

Learn more about stoichiometric law, here:

brainly.com/question/14465605

#SPJ1

6 0
1 year ago
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Someone help me please i’ll give brainly
Elza [17]

Answer:

it is endothermic change ..........

8 0
3 years ago
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3. What are the energy levels of electrons?
KiRa [710]
Energy levels inside an atom are the specific energies that electrons can have when occupying specific orbitals.
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Which one of the following compounds produces a basic solution when
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Answer:

Rb2O

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