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2 years ago

Which of these is a covalent compound?

Chemistry

2 answers:

AysviL [449]2 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]2 years ago

4 0

A. NO2 because the elements are both nonmetals.

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Arrange the compounds by their reactivity toward electrophilic aromatic substitution.

swat32

Answer:

The order of reactivity towards electrophilic susbtitution is shown below:

a. anisole > ethylbenzene>benzene>chlorobenzene>nitrobenzene

b. p-cresol>p-xylene>toluene>benzene

c.Phenol>propylbenzene>benzene>benzoic acid

d.p-chloromethylbenzene>p-methylnitrobenzene> 2-chloro-1-methyl-4-nitrobenzene> 1-methyl-2,4-dinitrobenzene

Explanation:

Electron donating groups favor the electrophilic substitution reactions at ortho and para positions of the benzene ring.

For example: -OH, -OCH3, -NH2, Alkyl groups favor electrophilic aromatic substitution in benzene.

The -I (negative inductive effect) groups, electron-withdrawing groups deactivate the benzene ring towards electrophilic aromatic substitution.

Examples: -NO2, -SO3H, halide groups, Carboxylic acid groups, carbonyl gropus.

4 0

2 years ago

What is the net ionic equation of the reaction of MgSO4 with Pb(NO3)2?

NemiM [27]

Hey there!:

Write the molecular equation for the reaction of MgSO4 with Pb(NO3)2 :

MgSO4(aq) + Pb(NO3)2(aq) ---> Mg(NO3)2(aq) + PbSO4(s)

Write the total ionic equation for the reaction :

Mg²⁺ (aq) + SO₄⁻² (aq) + Pb²⁺ (aq) + 2 NO₃⁻¹ (aq) + PbSO₄(s)

Therefore:

Cancel the spectator ions on both sides:

Pb²⁺ (aq) + SO₄⁻² (aq) ---> PbSO4(s)

Hope that helps!

4 0

2 years ago

Create and balance a chemical equation for the following statement.

m_a_m_a [10]

FeCl₂ + 2NH₄OH → Fe(OH)₂ + 2NH₄Cl

8 0

2 years ago

If you collect 1.75 L of hydrogen gas during a lab experiment when the room temperature is 23oC and the barometric pressure is 1

ziro4ka [17]

Answer:

$n=0.0747mol$

Explanation:

Hello,

In this case, since we can consider hydrogen gas as an ideal gas, we check the volume-pressure-temperature-mole relationship by using the ideal gas equation:

$PV=nRT$

Whereas we are asked to compute the moles given the temperature in Kelvins, thr pressure in atm and volume in L as shown below:

$n=\frac{105kPa*\frac{0.009869atm}{1kPa}*1.75L}{0.082\frac{atm*L}{mol*K}*(23+273.15)K} \\\\n=0.0747mol$

Best regards.

8 0

2 years ago

Which statement best describes alpha decay?(1 point)

Veseljchak [2.6K]

Answer:

After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is a type of nuclear fission.

6 0

2 years ago