CHEMISTRY HIGH SCHOOL

Water can dissolve other substances. Which factor best contributes to this property of water?A. Water is made up of ionic bonds.
B. Water has weak intermolecular forces.
C. Water is denser than most substances.
D. Water particles are not fixed in place.

Answers

Answer 1
Answer: Water is known to be theuniversal solvent because it can mostly dissolve most of the substances. Thereason behind its solvability is the bonding of intermolecular forces of attraction.The answer is letter B. Out of the many bondings between molecules, the bondthat governs water is H bonding or hydrogen bonding. Water is composed mostlyof two atoms of hydrogen one atom of oxygen. Both the hydrogen and oxygen arepolar elements and hydrogen is bounded with a high electronegativity oxygen atom.
Answer 2
Answer:

The correct answer for e2020 is D

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What is the name of the ionic compound that contains a NA+ ion for every Cl- ion

Which element has an atom with the greatest attraction for electrons in a chemical bond? A) As B) Bi C) N D) P

Answers

Answer is: C) N.

Nitrogen (N) has greatest electronegativity.

Electronegativity (χ) is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.  

Atoms with higher electronegativity attracts more electrons towards it, electrons are closer to that atom.  

Nitrogen has electronegativity χ = 3 and other elements have less.

\boxed{{\text{C) N}}} has the greatest attraction for electrons in a chemical bond.

Further explanation:

Electronegativity:

It is the tendency of an atom to attract the shared electrons in the bond towards itself. More the electronegativity of the atom, higher will be its tendency to attract the bonding electrons towards itself. The electronegative atom develops a partial negative charge and the electropositive atom develops a partial positive charge.

Electronegativity trends in the periodic table:

Along the period, electronegativity increases due to the increase in the nuclear charge. This results in the strong attraction of electrons.

Down the group, electronegativity decreases due to an increase in the size of elements. This results in a lesser attraction between the nucleus and the electron.

All the given elements (As, Bi, N, P) are present in the same group of the periodic table. Nitrogen is present at the top of the group so it has the highest electronegativity among the given elements. Phosphorus is present below nitrogen but above As and Bi so its electronegativity is less than nitrogen but more than the remaining elements. Arsenic is present above Bi so it has more electronegativity than Bi. Bismuth is present at the bottom of the group so it has the least electronegativity among the given elements.

Therefore, nitrogen has the greatest tendency to attract electrons towards itself in a chemical bond.

Learn more:

1. Which ion was formed by providing the second ionization energy? brainly.com/question/1398705

2. Write a chemical equation representing the first ionization energy for lithium: brainly.com/question/5880605

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Periodic classification of elements

Keywords: electronegativity, electron, N, P, As, Bi, group, period, increase, decrease, attraction, chemical bond, nitrogen, phosphorus, arsenic, bismuth.

All fossil fuels contain this element. iron hydrogen copper magnesium

Answers

Answer : Option B) Hydrogen

Explanation :

All fossil fuels contains hydrocarbons in it. Amongst the given options hydrogen is the correct answer. Except that it contains carbon in it. Hydrocarbons are those class of compounds which contains hydrogen and carbon as element in it.

      They are considered to be good fuels because they naturally bring out complete combustion as they contain hydrogen and carbon in its compound form.
B)Hydrogen is the answer.......

Decomposition of potassium chlorate (KClO3) produces potassium chloride (KCl) and pure oxygen (O2). The balanced equation for the reaction is as follows.mc017-1.jpg
What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g/mol.)

Answers

Molar mass :

KClO₃ = 122.55 g/mol
O₂ = 32 g/mol

2 KClO₃ = 2 KCl + 3 O₂

2 x 122.55 g KClO₃ ----------> 3 x 32 g O₂
10.0 g KClO₃ ------------------> ?

Mass of O₂ = ( 10.0 x 3 x 32 ) / ( 2 x 122.55 )

Mass of O₂ = 960 / 245.1

Mass of O₂ = 3.9167 g

number of moles O₂ => 3.9167 / 32 = 0.1223 moles 

1 mol -------------- 22.4 L ( at STP)
0.1223 moles ---- ?

V = 0.1223 x 22.4 / 1

V = 2.739 L

hope this helps!

Your answer is 2.74.

At 298 K, oxygen (O2) and ozone (O3) have different properties because their(1) atoms have different atomic numbers(2) atoms have different atomic masses(3) molecules have different molecular structures(4) molecules have different average kinetic energies

Answers

Answer: (3) molecules have different molecular structures.


Explanation:


1) Oxygen (O₂) and ozone (O₃) are allotropes of each other.


2) Allotropes are different structural forms of a same element with different structures and properties, when they are in the same state: solid, liquid, gas.


3) The bonds is what define the structure and properties of the substances, so since O₂ has only two bonds and O₃ has three bonds, the properties and behaviors of the element are different.


4) Other example of allotropes are graphite and diamond: two different forms of carbon. Both, graphite and diamond are formed only by carbon atoms, but they are bonded differently so, as you know, diamond and graphite have different properties: graphite is very soft while diamond is one of the hardest known substances.

What type of chemical bond links the monomers in a polymer?

Answers

alkenes such as ethene have at least one double bond in their chains and these join to make a polymer called polyethene but alkanes like ethane have only single bonds 

The difference between the transmissivity of shortwave insolation and longwave terrestrial radiation by various atmospheric gases is better known as the _________________.

Answers

Answer:

greenhouse effect

Explanation:

Greenhouse effect -

It is the process by which the radiations on the planet gets trapped inside its atmosphere and increases the temperature of the planet , is referred to as the process of greenhouse effect .

Few gases are responsible to show this process , like carbon dioxide . methane , water vapour etc.

The process of greenhouse is important for the planet to sustain life , as it makes the planet warm and thereby don't allow the planet to freeze ,

But  excess of greenhouse effect can make the planet extremely warm , and lead to a condition of global warming .

Hence , from the given information of the question ,

The correct answer is greenhouse effect .

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