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3 years ago

Which of these is a covalent compound?

Chemistry

2 answers:

AysviL [449]3 years ago

6 0

Answer : The correct option is, (A) $NO_2$

Explanation :

Ionic bond : It is defined as the bond which is formed by complete transfer of electrons from one atom to another atom.

The ionic compound is formed between a metal and a non-metal.

Covalent bond : It is defined as the bond that is formed when sharing of electrons takes place between the atoms.

The covalent compound is formed between two non-metals.

(a) $NO_2$

It is a covalent compound in which nitrogen and oxygen are non-metals. The $NO_2$ is formed when one nitrogen atom share their electrons with two oxygen atoms.

(b) $LiCl$

It is an ionic compound in which lithium is a metal and chlorine is a non-metal. The $LiCl$ is formed by the complete transfer of electrons.

(c) $AlCl_3$

It is an ionic compound in which aluminum is a metal and chlorine is a non-metal. The $AlCl_3$ is formed by the complete transfer of electrons.

(d) $Na_2S$

It is an ionic compound in which sodium is a metal and sulfur is a non-metal. The $Na_2S$ is formed by the complete transfer of electrons.

Hence, the covalent compound is $NO_2$

OLga [1]3 years ago

4 0

A. NO2 because the elements are both nonmetals.

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A gas at 300 k and 4.0 atm is moved to a new loacation with a temperature of 250 k. The volume changes from 5.5 L to 2.0 L. What

alexgriva [62]

Answer is: the pressure of the gas is 9,2 atm.
p₁ = 4,0 atm.
T₁ = 300 K.
V₁ = 5,5 L.
p₂ = ?
T₂ = 250 K.
V₂ = 2,0 L.
Use combined gas law - the volume of amount of gas is proportional to the ratio of its Kelvin temperature and its pressure.
p₁V₁/T₁ = p₂V₂/T₂.
4 atm · 5,5 L ÷ 300 K = p₂ · 2,0 L ÷ 250 K.
0,0733 = 0,008p₂.
p₂ = 9,2 atm.

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Question 2

LuckyWell [14K]

The first one is the answer

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Why is rusted iron an example of an oxidation-reduction m reaction

LekaFEV [45]

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The density of ice is 0.917 g/cm3. What volume of ice does 52.75 g occupy?

Vadim26 [7]

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density}$

From the question

mass of ice = 52.75 g

density = 0.917 g/cm³

The volume of the ice is

$volume = \frac{52.75}{0.917} \\ = 57.52453653$

We have the final answer as

Hope this helps you

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3 years ago