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3 years ago

What type of bond occurs when two atoms share one pair of valence electrons?

Chemistry

2 answers:

grigory [225]3 years ago

8 0

Answer: A single covalent bond is formed when two atoms share one pair of valence electrons.

Explanation: There is two types of bonding, ionic bonding and covalent bonding.

An ionic bond is formed between a metal and a non metal where a metal gives it's valence electron to the non metal. For example, In NaCl, Na is a metal with one valence electron and Cl is a non metal with seven valence electrons. Na gives its one valence electron to Cl and both of these get their nearest noble gas like electron configurations.

On the other hand, A covalent bond is formed by the sharing of electrons between two non metals.

If one pair of valence electrons is shared between two atoms then we call it single covalent bond and it is shown by a single line between two atoms.

Examples:- H-H, Cl-Cl etc

If two pairs of valence electrons are shared between two atoms then it is known as double covalent bond and if three pairs of electrons are shared between two atoms then it is known as triple covalent bond.

Example of double bond is $O_2$ and for triple bond it is $N_2$ .

mestny [16]3 years ago

5 0

A covalent bond occurs when two atoms share one pair of valence electrons

Brainliest answer please? :)

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Using the bond energy data from your text (or the internet), determine (show calculations for) the approximate enthalpy change ,

aleksley [76]

Answer:

∆H= 438 KJ/mol

Explanation:

First, we have to find the energy bond values for each compound:

-) Cl-Cl = 243 KJ/mol

-) F-F = 159 KJ/mol

-) F-Cl = 193 KJ/mol

If we check the reaction we can calculate the number of bonds:

$Cl_2_(_g_)~+~3F_2_(_g_)~->~2ClF_3_(_g_)$

In total we will have:

-) Cl-Cl = 1

-) F-F = 3

-) F-Cl = 6

With this in mind. we can calculate the total energy for each bond:

-) Cl-Cl = (1*243 KJ/mol) = 243 KJ/mol

-) F-F = (3*159 KJ/mol) = 477 KJ/mol

-) F-Cl = (6*193 KJ/mol) = 1158 KJ/mol

Now, we can calculate the total energy of the products and the reagents:

Reagents = 243 KJ/mol + 477 KJ/mol = 720 KJ/mol

Products = 1158 KJ/mol

Finally, to calculate the total enthalpy change we have to do a subtraction between products and reagents:

∆H= 1158 KJ/mol-720 KJ/mol = 438 KJ/mol

I hope it helps!

7 0

3 years ago

If 2.0 moles of magnesium hydroxide are present, how many moles of phosphoric acid, would be required for the reaction?

Olegator [25]

Answer:

1.33

Explanation:

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3 years ago

What are chemical formulas? Give an example of a chemical formula.

aniked [119]

Explanation:

NaCl, HCl, NaOH, KCl, CH3COOH

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3 years ago

The distance between a carbon atom and an oxygen atom in the co molecule is how far from the carbon atom is the center of mass o

DENIUS [597]

The distance between a carbon atom and an oxygen atom in the co molecule is 0.63

<h3>What is the distance?</h3>

Distance is the measurement of the farness of two objects from each other.

The distance between the molecules can be calculated by the given formula

$xcm = m_1+m_2m_1\times 1+m_2 \times 2$

Putting the values in the equation

$xcm = 12+1612 \times 0+16 \times 1.1 = 0.63 A^\circ$

Thus, the distance between a carbon atom and an oxygen atom in the co molecule is 0.63

Learn more about distance

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2 years ago

Read 2 more answers

Which statement about the temperatures of phase changes and electrostatic forces holding the molecules is correct?(1 point)

lubasha [3.4K]

The temperature at which phase changes occur is highly dependent on the electrostatic forces between the molecules in the substance.

The forces that hold molecules together are called intermolecular forces. These intermolecular forces affect the temperature at which phase changes occur. The statement about phase changes and electrostatic forces that is correct is that; "the temperatures at which a substance changes phases indicate the relative strength of the forces between molecules in the substance."

There are three states of matter, solid liquid and gas. The order of intermolecular forces in all the states of matter are not the same. The order of strongest collective electrostatic forces to weakest collective electrostatic forces is; solid, liquid, gas.

When water boils, the forces between water molecules break, and the bonds between the atoms in water are unchanged.

When a sample of calcium carbonate is cooled, the forces strengthen, and the molecule structure becomes more rigid.

If the boiling point of acetone is lower than the boiling point of ethanol, then, the intermolecular forces in ethanol are stronger than the intermolecular forces in acetone.

Learn more about phase changes: brainly.com/question/671212

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2 years ago