The lewis electron-dot structure of n2 has ________ nonbonding electrons pairs, ________ bonding electron pairs, and a bond order of ________.

Answer:The answer is 6

Explanation:

When heat is applied during a phase change, there is zero change in temperature. This is because all the heat supplied is used to break the bonds of the solid molecules to form liquid molecules. So in essence, there the temperature remains constant until all solid molecules bond are broken down (until all ice melts into liquid).

So the answer is Yes or True.

Potassium fluoride doesn't conduct electricity as a solid because its ions are locked in a fixed crystal lattice structure, and aren't free to move. However, when dissolved or melted, the ions can move freely, making it a conductor. Another factor is the large band gap in its molecular orbitals which prevents easy movement of electrons.

Potassium fluoride, like all ionic compounds, does not conduct electricity in its solid state because the ions in ionic solids are tightly held together by strong electrostatic attractions and thus, aren't free to move. The capacity to conduct electricity requires charged particles to move freely. In substances like potassium fluoride, these charges are locked in a fixed position within a crystal lattice structure.

However, this changes when potassium fluoride is either dissolved in water or melted, essentially when it is no longer in a solid state. In these cases, the ions of potassium and fluoride are free to move around and can carry an electric current. This freedom of movement of ions is referred as the substance being in a molten or dissolved state.

The concepts of valence and conduction bands in molecular orbitals of solids also play a role. In conductors, only a very small amount of energy is required to move electrons from the valence band to the conduction band whereas in insulators like potassium fluoride in its solid state, the band gap is large, making it a poor conductor of electricity.

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Titration is done using a titrant and analyte. In  a titration the name of the substance that is being determined is called the analyte.

Titration is an analytical method of finding concentration of a solution using a known concentration of a standard reagent. The standard reagent is called titrant and the solution with unknown concentration is called analyte.

There are different types of titrations such as acid-base titration, complexometric titration, potentiometric titrations etc. All these need an indicator and used to determine the end point by a color change.

In acid-base titration, acid is taken in the burette and base in the pipette and using an indicator the end point is noted.

In  complexometric titration, metal solutions are analyzed with an indicator capable of forming complex with the metal. In this way in all types of titrations the normality or molarity of the solution.

Hence, the substance being determined using titration is called analyte.

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Final answer:

The chemical reaction is an equilibrium reaction representing the partial dissociation of a weak acid, acetic acid, into acetate ions and hydrogen ions in aqueous solution.

Explanation:

The chemical reaction CH3CH2COOH (aq) ↔ CH3CH2COO- (aq) + H+ (aq) in aqueous solution is best described as the dissociation of a weak acid in water. This reaction is written as an equilibrium because it does not go to completion, and both the forward (dissociation) and reverse (re-association) reactions are occurring simultaneously. This reaction shows acetic acid partially ionizing in water to form acetate ions (CH3CH2COO-) and hydrogen ions (H+). The double arrows indicate that the reaction can proceed in both the formation and the re-formation of acetic acid. This behavior is common among weak acids, which do not completely dissociate in water.

Cu(OH)2 will decompose to give water as one of the products

The decomposition reaction will be

Cu(OH)2(s)   ----> CuO(s) + H2O(l)

Hence it is giving water as product

Answer is: covalent bond.

Covalent bond is bond between nonmetals. Carbon (C) and oxygen (O) are nonmetals.

Carbon atom and oxygen atom are connected by a triple bond (six shared electrons in three bonding molecular orbitals) that is formed of two covalent bonds and one dative covalent bond.

Dative covalent bond is formed by two electrons derive from the oxygen atom.

Carbon monoxide is a colorless, odorless, toxic and tasteless gas.

Ideal gas law is valid only for ideal gas not for vanderwaal gas.  At very low temperatures and very high pressures, real gases deviate from the behavior predicted by gas laws.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between pressure, temperature and volume is given as

PV=nRT

where,

P = pressure of ideal gas

V= volume of gas

n =number of moles of gas

T =temperature

R = Gas constant = 8.314J/K/mo

This law is not valid at very low temperatures and very high pressures because of the interaction between the particles increases and the factor of reduced volume come into picture.

Therefore, at very low temperatures and very high pressures, real gases deviate from the behavior predicted by gas laws.

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Ok, lets see the definitions of percent yield, actual yield and theoretical yield.

Percent yield is the ratio of actual yield to theoretical yield.

Actual yield- amount of product produced in the EXPERIMENT.

Theoretical yield- max amount of product produced through CALCULATIONS

% yield= actual yield (from experiment)/theoretical yield (from calculation) *100

1st Step: Write the reaction 

H2 + Br2 --> 2 HBr

2nd Step: Get the mass ratio of H2 and HBr to find theoretical yield

1 mole H2 gives 2 moles HBr ( molar mass of H2= 2 g/mol, HBr= 81 g/mol)

2 g H2 gives 2*81= 162 g HBr

30 g H2 gives 162*30/2 = 2430 g HBr ( The equation is 2 g H2/ 30 gH2= 162 g HBr/ x g HBr)

So theoretically 2430 g HBr are produced by calculation ( THEORETICAL YIELD)

By experiment 85 g HBr are produced as it is given at the question ( ACTUAL YIELD)

% yield= actual yield / theoretical yield *100 = 85/2430 *100= 3.5 %

The percent yield is 3.5 %.

A chemical change involves the conversion of substances into different substances, as in the separation of a compound into its elements which requires breaking chemical bonds, unlike a physical change.

An example of a chemical change is the separation of a compound into its elements. This process involves breaking chemical bonds and forming new substances with different properties than those of the original compound. For instance, table salt (a compound of sodium and chlorine) cannot be separated into sodium and chlorine by physical means like filtering or distillation; it requires a chemical process. In contrast, physical changes, such as the separation of a mixture or the condensation of steam, do not produce new substances and are reversible.

Burning of gasoline and the souring of milk are also examples of chemical changes, where original substances are transformed into new ones, such as carbon dioxide and water from gasoline, and denatured proteins and produced acid from milk.

A classic chemical change can be observed when natural gas is burned in a furnace, converting methane and oxygen into water and carbon dioxide, signifying not just a visual change but a molecular transformation as well.

Answer : The number of moles of calcium carbonate are 3.5 moles.

Explanation : Given,

Moles of carbon = 3.5 mole

The chemical formula of calcium carbonate is, [tex]CaCO_3[/tex]

By the mole concept:

In [tex]CaCO_3[/tex], there are 1 mole of calcium (Ca) atom, 1 mole of carbon (C) atom and 3 moles of oxygen (O) atoms.

As, 1 mole of carbon present in 1 moles of [tex]CaCO_3[/tex]

So, 3.5 mole of carbon present in 3.5 moles of [tex]CaCO_3[/tex]

Hence, the number of moles of calcium carbonate are 3.5 moles.

The number of moles of Carbon contained in 3.5 moles of Calcium Carbonate is; 3.5 moles of Carbon.

According to the question;

We are required to determine How many moles of carbon are in 3.5 moles of calcium carbonate.

The chemical formula of Calcium Carbonate is; CaCO3.

In essence, Calcium Carbonate contains;

Consequently, since 1 mole of Calcium Carbonate contains 1 mole of Carbon.

By proportion, 3.5 moles of Calcium Carbonate must contain 3.5 moles of Carbon.

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The first level must be filled with two electrons before electrons can be added to the second level.

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Answer:

It shows the reduction-oxidation tendency of chemical species present in the chart.

Explanation:

The reduction potential chart also known as activity series or electrochemical series is a reference series or chart constructed on the basis of reduction potential of standard hydrogen electrode (SHE). The standard reduction potential of SHE is considered to be zero.

Any species which can reduce SHE has negative reduction potential in the chart.

Any species which can oxidize SHE has positive reduction potential in the chart.

Higher the reduction potential more the tendency to undergo reduction and to oxidize others.

Lower the reduction potential more the tendency to undergo oxidation and to reduce others.

Answer:

D, concerns

Explanation:

edge 23