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3 years ago

How many pairs of electrons are shared in a single bond? A. 1 B. 2 C. 3 D. 4

Chemistry

2 answers:

kirill [66]3 years ago

7 0

Answer:

Explanation:

elena-14-01-66 [18.8K]3 years ago

6 0

Answer:

Explanation:

A.) A single bond shares 1 pair of electrons between 2 atoms.

B.) A double bond shares 2 pairs of electrons between 2 atoms.

C.) A triple bond shares 3 pairs of electrons between 2 atoms.

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Select the pair that consists of a base and its conjugate acid in that order. CO32−/CO22−

lana [24]

Answer: The pair that consists of a base and its conjugate acid in that order. $NH_3/NH_4^+$

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

$H_3PO_4\rightarrow H_PO_4{2^-}+2H^+$

$H_2CO_3\rightarrow HCO_3^-+H^+$

$NH_3+H^+\rightarrow NH_4^+$

$HCO_3^-\rightarrow CO_3^{2-}+H^+$

$NH_3$ is gaining a proton, thus it is considered as a brønsted-lowry base and after gaining a proton, it forms $NH_4^+$ which is a conjugate acid.

3 0

3 years ago

Identify from the following list of molecules and ions which behave as Lewis acids: CO2, NH3, BCl3, Fe3+. (A) CO2 and NH3 (B) NH

Anettt [7]

Answer : The correct option is, (D) CO₂, BCl₃, and Fe³⁺

Explanation :

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

(a) $CO_2$

It is a Lewis-acid because it can accepts electron pairs.

(b) $NH_3$

It is not a Lewis-acid because it can not accepts electron pairs but it is a base because it can donates and accept hydrogen ion.

(c) $BCl_3$

It is a Lewis-acid because it can accepts electron pairs because it has an incomplete octet and an empty 2p orbital.

(d) $Fe^{3+}$

It is a Lewis-acid because it can accepts electron pairs.

Hence, the ions which behave as Lewis acids are, CO₂, BCl₃, and Fe³⁺

6 0

3 years ago

An ion that consists of 7 protons, 9 neutrons, and 10 electrons has a net charge of

nasty-shy [4]

Answer:

-3

General Formulas and Concepts:

Chemistry - Atomic Structure

Protons have a positive (+) charge
Neutrons have a neutral (0) charge
Electrons have a negative (-) charge

Explanation:

Step 1: Define

7 protons, 9 neutrons, 10 electrons.

+7, +0, -10

Step 2: FInd charge

7 + 0 - 10 = -3

4 0

3 years ago

What is the tail of a comet made of? A. Heat B. Asteroids C. Melted materials D. Solar wind

grigory [225]

It's actually made or gas and dust that can extend hundreds of millions of kilometers away from the coma. most comets actually have two tails a plasma tell made of ionized gas and a dust tail made of small solid particles.

3 0

3 years ago

Read 2 more answers

Why can Marco hear the music, even though he is not in the same room as the speaker?

xeze [42]

Answer:

Sound Travels

Explanation:

Sound waves can travel, and that makes it so that even though Marco is in a different room, he can hear the music. Depending how loud the music is and how thick the walls car, the sound can travel through the walls.

6 0

3 years ago