Why are covalently bonded materials generally less dense than metallically or ionically bonded ones

Chemistry

1 answer:

Snowcat [4.5K]3 years ago

3 0

Explanation:

It is known that ionic compounds are formed by transfer of electrons from one atom to another. And, during this type of bonding there occurs long range of bonding structure due to the nature of ionic bonds.

As these also contain opposite charge hence, they are more tightly packed with each other.

Whereas in covalent bonding the atoms tend to share electrons due to which they are not tightly packed with each other. As a result, empty spaces are created between the bonding structure which tends to reduce the density of the material.

Therefore, covalently bonded materials generally less dense than metallically or ionically bonded ones.

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Kitty [74]

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How many times a one pound (2.2 kg) block of iron can be split in half before it stops being iron.

aleksley [76]

Answer:

Number of times a one pound (2.2 kg) block of iron can be split in half before it stops being iron

= 84.29 times

Explanation:

Atoms : It is the smallest indivisible particle of the matter .

The atom can not be further breakdown .

Here in this question , we have to find the number of atoms (because it is the last possible situation for breaking of atom)

Mole : The quantity of the substance that contain as many particles as present in 12 g of C-12.It is quantity which Avogadro number(N0) of particles

$N_{0}=6.022\times 10^{23}$

1.First calculate the number of moles of Fe in 2.2Kg Block

Mass of Iron (Fe) = 55.845 amu

Molar mass of Iron = 55.845 g

Given mass = 2.2 kg

1 kg = 1000 g

2.2 kg = 2200 g

$moles = \frac{given\ mass}{Molar\ mass}$

$moles = \frac{2200}{55.845}Moles of Fe = 39.39 2.Calculate the number of particles of Fe in 39.39 moles of Block[tex]moles = \frac{Number\ of\ Particles}{Avogadro\ number}$