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3 years ago

Describe the formation of a hydrogen bond and explain how it differs from a covalent or ionic bond

Chemistry

1 answer:

vlada-n [284]3 years ago

3 0

Answers:

Hydrogen bond is formed when positive end of one molecule attracted negative end of other molecule. The concept is similar to magnetic attraction where opposite poles attract each other.

Explanation:

While understanding hydrogen bond, two terms are important, one is electronegativity (tendency of atoms to attract electrons towards itself) and other is dipole (separation of positive and negative charge in a molecule). Hydrogen bond is always formed between hydrogen atom and other atoms having electronegativity different than hydrogen.

Differ from Ionic and Covalent Bonds:

Hydrogen bond is weaker than ionic and covalent bond. Ionic and covalent bonds are intramolecular (within the molecule) whereas hydrogen bond is intermolecular (between molecules).

Example:

Formation of hydrogen bonding in water.

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stiks02 [169]

Answer: H

Explanation:

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3 years ago

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A wooden block has a mass of 125 g and a volume of 55 cm3. What is its density?

leonid [27]

Answer:

d = 2.27 cm3

Explanation:

m = 125 g

V = 55 cm3

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3 years ago

A balloon filled with 1.22 l of gas at 286 k is heated until the volume is 2.86 L while the pressure remains constant. What is t

telo118 [61]

Answer: 670K

Explanation:

Given that,

Original volume of gas V1 = 1.22 L

Original temperature T1 = 286 K

New volume V2 = 2.86 L

New temperature T2 = ?

Since volume and temperature are involved while pressure is constant, apply the formula for Charles law

V1/T1 = V2/T2

1.22 L/286 K = 2.86 L/ T2

Cross multiply

1.22 L x T2 = 286 K x 2.86 L

1.22T2 = 817.96

Divide both sides by 1.22

1.22T2/1.22 = 817.96/1.22

T2 = 670.459 K (Round to the nearest whole number as 670 K)

Thus, the temperature of the gas is 670 Kelvin

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3 years ago

Please i need to pass this!<br><br> Please try

RoseWind [281]

It is incorrect because it should have a total of eight electrons with two electrons between each H and O

<h3>Further explanation </h3>

Lewis structure shows the form of bonds that occur in the valence electrons of an element or compound

This bonding usually occurs in covalent bonds

Valence electrons are electrons used in a chemical bond

The main group elements usually have valence electron configurations in the ns and np subshells, While the transition elements in the subshells (n-1) d and ns.

Element O has 6 valence electrons

Element H has 1 valence electron

To achieve stability, the element O needs 2 more electrons which are obtained from 2 electrons from the H element, while the H element needs 1 electron to be stable

So that a covalent bond is formed

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3 years ago

What is the maximum number of electrons that can go into each of the following sub levels

zaharov [31]

The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain 6 electrons max. The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max.

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3 years ago