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Stells [14]
2 years ago
5

PLEASE HELP!! URGENT!!

Chemistry
1 answer:
inna [77]2 years ago
5 0

Answer:

Explanation:

Ionic bonds are polar and some covalent bonds are also polar.

it depend upon the electronegativity of bonded atoms. If electronegativity difference of both  bonded atoms are greater than 0.4 polar covalent bond is formed. While in case of ionic bond there is huge difference between electronegativity of bonded atoms one with higher electronegativity complete gain the electron from atom with lower electronegativity and ionic bond is formed.

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.  

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.  

The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive.

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A cube with a mass of 250.0 g has sides measuring 5.00 cm each. What is the density of this cube in grams per cubic centimeter?
stiks02 [169]

The density of the cube in grams per cubic centimeter = D = 2 gram / cm³  

Explanation:

The Volume Of the Cube is  V =  a³

Its is given that the  cube has sides measuring 5 cm each side.

V = ( 5 )³

= 5cm 5cm 5cm

V = 125 cm³

The Density Formula, Density= Mass / Volume.

Given that this cube has a mass of 250 grams.

to calculate density

D = ρ = m / V

= 250 / 125

= 2

D = 2 gram / cm³

5 0
2 years ago
A volume of 80.0 mL of aqueous potassium hydroxide (KOH) is titrated against a standard solution of sulfuric acid (H2SO4). What
yaroslaw [1]

Answer:

0.478 M

Explanation:

Let's consider the neutralization reaction between KOH and H₂SO₄.

2 KOH + H₂SO₄ → K₂SO₄ + 2 H₂O

12.7 mL of 1.50 M H₂SO₄ react. The reacting moles of H₂SO₄ are:

0.0127 L × 1.50 mol/L = 0.0191 mol

The molar ratio of KOH to H₂SO₄ is 2:1. The reacting moles of KOH are 2 × 0.0191 mol = 0.0382 mol

0.0382 moles of KOH are in 80.0 mL. The molarity of KOH is:

M = 0.0382 mol/0.0800 L = 0.478 M

3 0
3 years ago
Select the statement (2.5 points) (A) Bonding is the joining of the two atoms in a stable arrangement. (B) Through bonding , ato
Tanya [424]

Answer:

The correct answer is (D) All of the above.

Explanation:

A chemical bond is the attraction force between atoms (covalent bond) or between oppositely charged ions (ionic bond) to form a stable arrangement. In order to get a stable arrangement must be fulfilled the octet rule. This establishes that an atom could share (covalent bond) win or lose (ionic bond) electrons with other atoms till every atom has eight valence electrons. The complete outer shell of valence electrons make elements stable to get a stable noble gas configuration.

6 0
3 years ago
What principal quantum number refers to:
docker41 [41]
The principle quantum number "n" represents the relative overall energy of each orbital, and the energy of each orbital increases as the distance from the nucleus increases. The sets of orbitals with the same "n" value are often referred to as electron shells or energy levels. 
4 0
3 years ago
How many joules of heat are absorbed when 73 g water are heated from 30*C to 43*C? *
stepladder [879]

Answer:

3966.82 J

Explanation:

q=sm∆T

q=73×13×4.18

the specific heat for water is 4.18

6 0
2 years ago
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