What the rows of elements in the periodic table called?

A: orbitals
B: s, p, d, and f blocks
C: periods
D: groups

Answer:

See explanation

Explanation:

Electro negativity refers to the ability of an atom in a molecule to attract the shared electrons of a bond towards itself.

Electro negativity is a property of elements. It increases across the period and decreases down the group in the periodic table.

When two elements with differing electronegativities form a bond, the atom that has a greater electro negativity tends to pull the shared electrons of the bond towards itself. By so doing, there is greater electron density around that atom compared to the other atom. The more electronegative atom therefore acquires a partial negative charge while the other atom acquires a partial positive charge. This leads to a dipole in the molecule.

A molecule is said to be polar when it possess a dipole, that is, a positive end and a negative end. This phenomenon in turn arises when there is a significant difference in electro negativity between two atoms that compose the bond.

For instance, consider the formation of HF. Hydrogen has an electro negativity of 2.2 while fluorine has an electro negativity of 3.98. The difference in electro negativity between the both atoms is about 1.78. The molecule is polar with the negative end of the dipole at fluorine and the positive end at hydrogen.

Polyethene is a polymer composed of repeating units of the monomer ethene.

The properties of polyethene are as follows:

Polymers are large macromolecules consisting of long repeating chains of smaller molecules known as monomers.

An example of a polymer is polyethene composed of repeating units of the monomer ethene.

The density of polyethylene ranges 0.857 g/cm3 to 0.975 g/cm3.

The specific heat capacity of polyethene is 1.9 kJ/kg.

The melting temperature of polyethene is approximately 110 °C.

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The number of KNO3 molecules in 0.750 mol of KNO3 would be 4.52 x  [tex]10^{23}[/tex] molecules

The number of molecules of a substance is defined by Avogadro's constant, such that:

1 mole = 6.022 x [tex]10^{23}[/tex] molecules

In this case, the number of mole is 0.750

Thus, the number of molecules in 0.750 moles of KNO3 can be calculated as:

        0.750 x 6.022 x [tex]10^{23}[/tex] = 4.52 x  [tex]10^{23}[/tex] molecules

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Answer:

1.04 moles of AlCl₃

Explanation:

Balanced Equation:  2Al°(s) + 3Cl₂(g) => 2AlCl₃(s)

Approach => convert given data (28 g Al°) to moles. The number of moles  AlCl₃ would equal the number of moles aluminum because coefficients for Aluminum and Aluminum Chloride are equal.

moles Al° = (28g)/(27g/mole ) = 1.04 mole Al°

From balanced equation moles AlCl₃ produced equals moles of Al° produced = 1.04 mole AlCl₃ because coefficients of Al° & AlCl₃.

Answer:

m = 129,96 g

Explanation:

c = n / V

n = c * V

n = 1,23 mol/l * 0,14 l

n = 0,722 mol

n = m / M

m = n * M

m = 0,722 mol * 180 g/mol

m = 129,96 g

Answer:

Bro what numbers? And whats the question?

Answer:

CH3OH and NADH

Explanation:

The given chemical reaction is an redox reaction in which reduction and oxidation take place.

In the process of oxidation: electrons are loss while in the process of reduction: electrons are gained.

In the given redox reaction: CH3OH + NAD --> CH2O + NADH

NAD is reduced to NADH as NADH gains one hydrogen electron while CH3OH (methanol) is oxidized to CH2O (methanal)  by losing electrons.

So, CH3OH (methanol) and NADH are the reduced forms while NAD and CH2O (methanal) are oxidized forms.

Answer: this is the correct answer :)

Explanation:

Image shows ;)

Answer:

Acidic

Explanation:

The average pH of the ocean is now around 8.1, which is basic (or alkaline), but as the ocean absorbs more CO2, the pH drops and the ocean becomes more acidic.

Answer:

proton

Explanation:

neutron: A subatomic particle forming part of the nucleus of an atom. It has no charge. It is equal in mass to a proton or it weighs 1 amu.

Answer:

protons

Explanation:

approximately the same mass

Answer:

38.8125

Explanation:

4.5 x 5.750 x 1.50 = 38.8125

there are .1667 (.17) mols in 7 grams of Sodium Fluoride (NaF)

hope this helps :)

Answer:

Imagine that the planet is an onion. When you open it, you will discover that it can be separated into layers that are perfectly independent from each other, but that they make sense if they are united. The central part of the onion is different, almost circular.

Explanation:

The center of the planet is known as the nucleus. This layer is shaped like a sphere, and in turn is made up of two layers: the inner core (where the temperature reaches up to 5000 degrees Celsius) and the outer core (whose consistency is semi-liquid). The core is made up of nickel, iron, sulfur, oxygen, and copper.

Answer:

The volume of the balloon increases as you add moles of gas to the balloon by blowing it up. If the container holding the gas is rigid rather than flexible, pressure can be substituted for volume in Avogadro's Law. Adding gas to a rigid container makes the pressure increase

Answer:

Al = 13.4%  Cr = 38.8%  O = 47.7

Aluminium Chromium Oxygen

Explanation:

im so sorry if i am wrong

Answer:

A prokaryotic cell is a simple, single-celled (unicellular) organism that lacks a nucleus, or any other membrane-bound organelle. We will shortly come to see that this is significantly different in eukaryotes. Prokaryotic DNA is found in the central part of the cell: a darkened region called the nucleoid.

Explanation:

HiH

Answer:Prokaryotes

Explanation:Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.

Explanation:

if you could repeat a lab and make it better the first thing is to get more people inside to help you study and find evidence. that matches and make sure your guess is right before sending out false info

Answer:

only formed during complete combustion

Explanation:

ex:c+o2=co2 then it is a oxide

From the solution of hydrochloric acid that is in the reaction with pottassium dichromate, the fully balanced equation for the reaction is K₂Cr₂O₇+6FeCl + 14HCI→ 2KCl +6FeCl₃ + 2CrCl₃+7H₂0

This is the chemical reaction that takes place due to the fact that oxygen has been added to a substance.

a. Fe2O3+ 6HCl→2FeCl₂ + 3H₂O

Fe³⁺+e→Fe2+

2FeCl₃+SnCl₂ → 2FeCl₂ + SnCl₄

Fe²⁺ - e→Fe³⁺

K₂Cr₂O₇+6FeCl + 14HCI→ 2KCl +6FeCl₃ + 2CrCl₃+7H₂0

b. 0.02 mol/dm³ = 2x10⁻⁵ mol/ml

26.4 cm³ is the same as 26.4 ml

n(K₂Cr₂0₇) = 26.4 x2x10⁻⁵

This gives 52.8x10⁻⁵

n(FeCls) = 6n(K₂Cr₂0₇) = 3.168 x 10⁻³

n(FeCl₂)= n(FeCl₃) = 3.168x10⁻³

2 x 56 + 3x16 = 160 gram/mol

3.168x10⁻³/2 =  1.584x10⁻³

1.584x10⁻³ x 160 = 0.253

0.253 x 100/2.83 = 8.96 percent

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Explanation:

8O² + 1S⁸ ----> 8SO²

this is the true coefficient...

Answer:

K2S and NaOH are soluble

Explanation:

Because thay have ions formed from elements

Answer:

bonding electrons are when the electron have the same number and the connect,like valence electrons. Non-bonding electrons are only possible when an atom is unstable, no more than 2 electrons or if the atom is an isotope. bonding electron pairs occur in a covalent bond between two atoms. they include one electron from each atom in the covalent bond. non-bonding pairs do not take part in bonding. they are the left over electrons in the outter shell of the atom.

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Explanation:

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Answer:

Simplify:

3

√

8

y

3

.

Solution: Use the fact that

n

√

a

n

=

a

when n is odd.

Answer:

2

y

Explanation:

Answer:

0.25 moles (See below for explanation)

Answer:

5' carbon

Explanation:

Attaching a phosphate group

A phosphate group is attached to the sugar molecule in place of the -OH group on the 5' carbon.

Answer:

The phosphate group on one nucleotide links to the 3' carbon atom on the sugar of another one. In the process, a molecule of water is lost - another condensation reaction.

Hail is most commonly formed within the cumulonimbus clouds of thunderstorms. Large updrafts of air can throw rain droplets high up into the tops of the cloud.

What is a thunderstorm?

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#SPJ1

Answer:

Explanation:

Hope this helps good day