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4 years ago

Which is the best definition of non polar covalent bond?

Chemistry

2 answers:

Finger [1]4 years ago

8 0

Answer: B. A covalent bond in which the electrons are shared equally

Explanation:

Covalent bonds are formed by sharing of electrons between non metals.

A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms. It is also defined as the bond which is formed due to the unequal sharing of electrons between the atoms. Example: $HF$

Non-polar covalent bond is defined as the bond which is formed when there is no difference of electronegativities between the atoms. It is also defined as the bond which is formed due to the equal sharing of electrons between the atoms. Example: $H_2$

julia-pushkina [17]4 years ago

3 0

B. A covalent bond in which the electrons are shared equally .

A. "A covalent bond in which the electrons are shared unequally" is incorrect. Such a bond would be a polar covalent bond

C. "A covalent bond formed between a metal and a non-metal" is incorrect. Such a bond would be an ionic bond.

D. "A covalent bond formed between two different elements" is incorrect. We would need to know the elements before we could decide the type of bond.

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Write a net ionic equation to show how codeine, c18h21o3n, behaves as a base in water.

Lera25 [3.4K]

Actually, the ionic equation for this is a reversible equation since codeine is a weak base. Any weak base or weak acids do not completely dissociate which makes them a reversible process. The ionic equation for this case is:

C18H21O3N + H3O+ <=> C18H21O3NH+ + H2O

7 0

3 years ago

Pb has an atomic number of 82. It has an isotope Pb-207. The mass number is 207.

nikdorinn [45]

Answer:

Number of protons = 82

Explanation:

Given data:

Atomic number of Pb = 82

Mass number of Pb-207 = 207

Number of protons = ?

Solution:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

Atomic number of Pb = number of protons or electrons

82 = number of protons or electrons

Mass number = Number of protons + number of neutron

207 = 82 + number of neutron

Number of neutrons = 207 - 82

Number of neutrons = 125

5 0

3 years ago

Which is an example of a natural disaster limiting population growth?

fenix001 [56]

Answer:

A hurricane wiping out a new species of flower in the tropical rain forests of Brazil.

Explanation:

8 0

4 years ago

Read 2 more answers

The density of ammonia gas under certain conditions is 0.625 g/l. calculate its density in g/cm3.

MatroZZZ [7]

From the conversion of units:
1 cm^3 is equivalent to 1 mL
1 L is equivalent to 1000 mL
therefore,
to convert from liter to cm^3, we simply multiply by 1000.
Note that the multiplication will be done in the denominator.

Based on this:
density = (0.625 g/l) x (1g/1000 cm^3) = 0.000625 g/cm^3
= 6.25 x 10^-4 g/cm^3

6 0

3 years ago

Mention 10 products made from crude oil

garri49 [273]

Answer:

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A U.S 42-gallon barrel of crude oil yields about 45 gallons of petroleum products in U.S. refineries because of refinery processing gain. This increase in volume is similar to what happens to popcorn when it is popped."

"What are petroleum products, and what is petroleum used for?

Petroleum products include transportation fuels, fuel oils for heating and electricity generation, asphalt and road oil, and feedstocks for making the chemicals, plastics, and synthetic materials that are in nearly everything we use. Of the approximately 7.21 billion barrels of total U.S. petroleum consumption in 2016, 47% was motor gasoline (includes ethanol), 20% was distillate fuel (heating oil and diesel fuel), and 8% was jet fuel."

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4 0

2 years ago