You make a solution using a solute(5g) in water (total volume 100ml). The molar mass of the solute is 110 g/mol.
What is the molarity?
What is the concentration reported as % by mass?

One of the attributes listed below that reflects a physical property is the density of iron, which is 7.9 g/cm3.

The correct answer is A

The term "density" refers to the ratio between the volume (the amount of space taken up by an object or substance) and the amount of matter contained therein (its mass). The quantity of mass per volume unit is another method to define density.

The amount of matter a volume can hold is measured by its density. At the same size, a dense item weighs greater than a lesser dense one. On it, a substance with a density less than seawater will float whereas one with a higher density will sink. The concentration equation is D = M / V, or density equal mass per unit volume.

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The replacement of hydrogen with fluorine alter the properties of the compound by increasing the density.

Fluorine has special (and frequently significant) properties that are present in organic compounds where some or all of the hydrogen atoms are substituted. Because the C-F bond energy is higher than the C-H bond energy , fluorocarbon compounds have a high degree of kinetic stability but may not be particularly thermodynamically stable.

The density is increased when hydrogen is replaced with fluorine because fluorine's small size means that the substitution causes the least amount of deformation or structural change. Similar to metal salts, fully fluorinated organic molecules have low boiling temperatures due to the weak intermolecular interactions. For fluoropolymers like polytetrafluoroethylene, which is widely used, the low coefficient of friction is one characteristic of the low inter-molecular forces.

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Gasoline combustion in a car engine generates heat and light by reacting with oxygen, which propels the vehicle.

A fuel and an oxidizer undergo a chemical reaction known as combustion to create heat and light. The majority of these reactions are exothermic, which means that heat and light are released as forms of energy.

In class 10, some illustrations of combustion reactions are:

 Burning wood or paper produces heat, light, and carbon dioxide when combined with oxygen.

 Fossil fuels are burned in order to produce heat and light when combined with oxygen.

 When used for cooking or heating, propane gas combines with oxygen to produce heat and light when burned in a stove.

  Magnesium burns when combined with oxygen, creating a bright white flame that emits energy in the form of heat and light.

These are only a few real-world instances of combustion reactions. To be able to manage and prevent the negative impacts of fire, it is crucial to comprehend the fundamental concepts behind combustion processes.

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The liquids formed three distinct layers because of different densities.

Ice has a density less than 1 g/cm3

We have to note that if the density of the liquids are not the same then the liquids would have to separate based on the density of each of the liquids. We have to also note that none of the liquids can be found to be miscible at all.

We know that the object that is less dense is the object that is going to float so the fact that ice was floating on the water means that the ice is less dense than water.

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A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

Solutes are substances dissolved in solvents. If the solvent particles attract more than the solute particles, they pull them apart and surround them. These particles leave the solid solute and enter the solution. During solution mixing, chemical polarity causes solvation-specific interactions.

When the solvent constitutes the majority of the combination, the solution usually has the solvent's condition. The concentration of a solution is a key parameter. Aqueous solutions contain water as a solvent. Solutes will not precipitate unless added in excess of the mixture's solubility, which causes hyper saturation.

The complete question is.

What is a homogeneous mixture of one or more solutes dissolved in a solvent​?

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CO₂  is the formula of the compound forming the reaction when someone reacts oxygen with carbon.

Combustion is the chemical reaction that occurs when a substance reacts with oxygen to produce heat. Ethane, wood, and propane are a few examples.

Combustion systems use the energy released by chemical compounds during this reactive process to power vehicles, generate electricity, and provide heat for a variety of applications.

A combustion is another type of combination reaction in which something combines with oxygen and produces heat and light.

Thus, The reaction between carbon and oxygen can be represented as follows:

C(s) + O2 (g) → CO2 (g) + heat.

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A student investigated the electrolysis of aqueous solutions using inert electrodes. The element graphite is a form of electrode. The correct option is C.

The process of separating water into hydrogen and oxygen is known as electrolysis. This reaction occurs in a device known as an electrolyzer.

Because of the structure of graphite, which makes it a great conductor, graphite rods are employed as electrodes in electrolysis. There are anodes and cathodes in the electrolysis process.

Therefore, the correct option is C. Electrodes.

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(B) HCN. According to the VSEPR theory, HCN species is linear. It features a triple bond between the C and N atoms and a bond angle of 180 degrees. It is a linear molecule.

According to the theory, electron pairs organize themselves to reduce their magnetic attraction to one another. Lone pair-lone pair > lone pair-bond pair > bond pair-bond pair are the electron pair repulsions in decreasing order. Examples of molecules that follow the VSEPR model include 1.

Because they are negatively charged, electron pairs will go as far apart as they can. Space is taken up by lone pairs rather than bonded electron pairs. Compared to single bonds, double bonds take up more room.

Because it ignores the relative sizes of the substituents and stereochemically inactive lone pairs, the VSEPR model also fails to predict the structure of some compounds. The d-block elements tend to contain electron pairs that are stereochemically inactive and have relatively high atomic masses.

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The two methyl groups are equal since they share the same binding and are symmetric to another. The 1H NMR spectrum contains a total of three chemical reaction signals.

In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.

The methyl group has two effects: it prevents transcription factors from binding, which in turn recruits RNA polymerase II, but it also permits the binding of a group of proteins that recognise the methylated DNA with particularity. These proteins then recruit histone deacetylases, which modify the histones connected.

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The molecules of a solid phase have the greatest intermolecular forces, compared to their kinetic energies.

This is because solids have a much higher density than gases or liquids, which means that the molecules are more closely packed together and experience stronger intermolecular forces. At the same time, the kinetic energy of molecules in the solid phase is much lower than that of molecules in the gas or liquid phase, since the molecules are not able to move around as freely.

This results in greater intermolecular forces relative to the kinetic energy of the molecules, making the solid phase the phase with the greatest intermolecular forces compared to their kinetic energies.

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At a level of 20 degrees Celsius, water has a viscosity of roughly 0.01 point or 10-3 Pa. (Pascal seconds). The resistance of the a liquid to deformation at the a specific rate is measured by its viscosity.

What is the water's viscosity rating?

0.010019 poise

The stiffness of water was measured at 0.010019 poise as opposed to the recognized norm of 0.01005 poise during the previous 30 years.

Is water one viscosity?

At the a temperature of twenty degrees Celsius, water has a viscosity of roughly 0.01 point or 10-3 Pa. (Pascal seconds). The resistance of the a fluid to distortion at the a specific rate is measured by its viscosity.

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The solution is Fe2O3, which has a molar mass of 159.69 g/mol.

Fe2O3—is it rust?

Acids can easily attack Fe2O3. Because it has many of the same qualities and a similar composition to rust, iron(III) oxide is frequently referred to as rust. However, in chemistry, rust is classified as hydrous ferric oxide and is not well understood.

Why is ferric Fe2O3 called that?

Iron(III) oxide, which contains three oxygen atoms and two iron atoms, has the chemical formula Fe2O3. Fe2O3 is in a +3 oxidation state. The differential in electronegativity between oxygen and iron is what determines whether a bond will form between the two atoms. While oxygen (O2) is a non-metal, iron (Fe) is a metal.

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Malonyl-CoA reactant is involved in both fatty acid synthesis and breakdown.

It is used in the formation of fatty acids as an intermediate molecule in fatty acid synthesis. In fatty acid breakdown, on the other hand, it acts as a substrate for the breakdown of fatty acids in the mitochondria to produce energy. Furthermore, NADPH is involved in the synthesis of fatty acids because it provides the necessary reducing power. Pantothenic acid, also known as Vitamin B5, is a cofactor needed for fatty acid synthesis and other cellular processes. A. Although CO2 is not directly involved in the synthesis or breakdown of fatty acids, it is produced as a byproduct of cellular respiration.

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The policy's likely beneficiaries could turn out to be suspicions.

Term life insurance can be the best option if staying within your financial means is your top priority. if you are a parent to many children.

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Neutral atoms have the same number of protons as electrons, electrons surround the nucleus, the nucleus is composed of protons and neutrons, protons are positively charged, and gaining or losing protons produces different ions.

An isotope is a variation of an element that has a different number of neutrons but the same number of protons. This means that isotopes of an element have the same atomic number, but a different atomic mass due to the difference in neutrons. For example, carbon-12 and carbon-14 are two isotopes of carbon, with the former having 6 neutrons and the latter having 8 neutrons. This distinction of isotopes allows for the study of different atomic structures and their properties.

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One molecule of glucose is created by the calvin cycle using six water and carbon dioxide, 18 molecules bacterial ATP, as well as 12 molecules of NADPH.

Glucose, the main type of sugar found in blood, is the main energy source for bodily cells. Glucose can be produced by our bodies from food or from other substances. The symbolizes the way glucose into the cells. One molecule that controls levels of blood sugar is insulin.

Using water, carbon dioxide, and solar energy, the preponderance of vegetation and algae manufacture glucose, which is then used to build cellulose, the most common carbohydrate in existence, there in cell walls.

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The hydrogen bonding is differ between the specific nucleobase pairs as  cytosine bonds to guanine with the 3 hydrogen bonds and the adenine binds with thymine with the 2 hydrogen bonds .

There ae the four nucleobase, in which the  cytosine bonds to guanine with the 3 hydrogen bonds and the adenine binds with thymine with the 2 hydrogen bonds . This is as follows :

G-C base pairs = 3 hydrogen bonds,

A-T base pairs = 2 hydrogen bonds

Therefore, the double-stranded DNA with the higher number of the G-C nucleobase pairs will have more strongly bonded together and are more stable, and they have the higher melting temperature.

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The molecular compounds are composed of the two or more non metals.

The molecular compound are generally composed of the two or more non metal elements. The Molecular compounds are named as  the first element comes first and then the second element comes second by using the element name plus the use of suffix - ide. The molecular compound formed by the equal sharing of the valence electrons between the atoms .

The Molecular compounds are the chemical compounds that are the form of the different molecules. The examples of the molecular compounds are water (H₂O) and the carbon dioxide (CO₂).

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A substance that has mass and occupies space is called matter. Matter is considered as a substance that has a mass in it.

It also occupies space or volume. The matter is considered to consist of various types of particles which have different sizes as well as mass in it. The matter has the capability of existing in several ways.

The major types of existence of matter are solid, liquid and gas in which the existence depends upon the temperature or the pressure that surrounds the particulate matter. The matter of its different types can combine with the other substance in order to perform various types of ingredients.

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Generally, atoms are made of extremely tiny particles called protons, neutrons, and electrons. Protons and neutrons are present in the center of the atom, making up the nucleus and electrons surround the nucleus.

An electron is defined as a negatively charged subatomic particle that can be either bound to an atom or free (not bound). An electron which is bound to an atom is one of the three primary types of particles within the atom, the other two are protons and neutrons.

A neutron is defined as a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The name of neutron is derived from the fact that it has no electrical charge; it is neutral. Neutrons are basically extremely dense.

Proton is defined as a small, positively charged particle of matter found in the atoms of all elements. Streams of protons which are generated by special equipment can be used for radiation treatment.

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The molarity to make a 100 ml solution by dissolving 5g of a solid solute is 0.45 M. It can be calculated by using molarity formula.

Molarity is the concentration of a solution in terms of moles of solute per liter of solution. It is denoted by the unit "M" (moles per liter).

The molarity of a solution can be calculated as the number of moles of solute divided by the volume of the solution in liters.

First, we need to determine the number of moles of solute:

5g / 110 g/mol = 0.045 moles

Next, we need to convert the volume of the solution from milliliters to liters:

100 ml * (1 L / 1000 ml) = 0.1 L

Finally, we can calculate the molarity:

0.045 moles / 0.1 L = 0.45 M

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When atoms with various electronegativities share electrons inside a covalent link, the result is a polar covalent bond.

Atoms are made up of a nucleus in the middle that is surrounded by protons, neutrons, and electrons. Uranium is split into smaller atoms during the fission process, creating new atoms. The creation of atoms in enormous numbers can be seen in the Big Bang as well as Supernova phenomena.

Every component of an element is an atom. A specific element only has one kind of atom per atom. Protons, neutrons, and electrons, which are subatomic particles, make up the remainder of an atom. Chemical reactions allow elements to unite to create molecules.

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A) The heat released by the reaction can be calculated by using the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation.

Since the reaction releases 15,026 kJ of heat per mole of C12H26, we can calculate the amount of heat released by 21.3 g of CO2 produced:

First, we need to find the number of moles of CO2 produced: n = mass / molar mass = 21.3 g / (24 g/mol) = 0.8875 mol.

Next, we can use the number of moles to find the heat released: q = ΔH = -nΔHf = -0.8875 * 15026 kJ/mol = -13038.75 kJ.

B) The amount of C12H26 consumed can be calculated by using the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation.

Since the reaction releases 15,026 kJ of heat per mole of C12H26, we can calculate the number of moles of C12H26 consumed:

n = q / ΔHf = 500 kJ / 15026 kJ/mol = 0.03308 mol.

Finally, we can use the number of moles to find the mass of C12H26 consumed:

mass = n * molar mass = 0.03308 mol * (12 g/mol + 26 g/mol) = 0.03308 mol * 38 g/mol = 1.25 g.

C) The amount of C12H26 required to generate heat to raise the temperature of 750 g of liquid water can be calculated using the equation q = mCΔT, where q is the heat, m is the mass, C is the specific heat capacity of the water, and ΔT is the change in temperature.

First, we need to find the heat required to raise the temperature of 750 g of liquid water:

q = mCΔT = 750 g * 4.18 J/g°C * (90 - 10)°C = 261300 J.

Next, we can use the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation, to find the number of moles of C12H26 required:

n = q / ΔHf = 261300 J / 15026 kJ/mol = 17.3 mol.

Finally, we can use the number of moles to find the mass of C12H26 required:

mass = n * molar mass = 17.3 mol * (12 g/mol + 26 g/mol) = 17.3 mol * 38 g/mol = 657 g.

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Calcium carbonate (CaCO3) is an important component of coral reefs. 0.986 moles are in 98.6 g of CaCO3.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

Number of moles of CaCO3 = Mass / Molar mass

Number of moles of CaCO3 = 98.6 g / 100g/ mol

= 0.986 moles

The balanced chemical equation of this reaction is as follows:

CaCO₃ → CaO + CO₂

Therefore, the reaction ratio is 1:1:1.

So, 0.986 moles of CaO are formed.

Thus, 98.6 g CaCO3 = 0.986 moles CaCO3.

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Lewis electron-dot diagram for a fluoride ion is mentioned below.

What is lewis dot diagram?

Diagrams that show the chemical bonds between the atoms of a molecule are known as Lewis dot structures, also known as electron dot structures. Additionally, they show the total number of lone pairs found in each of the atoms that make up the molecule. Gilbert N. Lewis introduced the Lewis structure in his 1916 article The Atom and the Molecule, and it bears his name.

What is ion ?

Atoms or groups of atoms with an electric charge are referred to as ions. Cations are positive-charged ion particles. Anions are ion types that have a net negative charge. The body contains ions of several common chemicals. Examples that are frequently used are sodium, potassium, calcium, chloride, and bicarbonate.

The fluorine atom forms fluoride, which has 8 valence electrons, and is isoelectronic with a Noble Gas .

:

:F:

 :

Therefore, Lewis electron-dot diagram for a fluoride ion is mentioned above.

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These nuclear processes also produce subatomic particles like protons or neutrons.

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Yes a good hypothesis contradicts prior hypothesis.

Prior hypothesis is defined as a bias a decision-making error in which decision makers rely on strong prior beliefs about the relationship between two variables even when presented with evidence that their beliefs are wrong.

Good hypotheses are also known as testable hypotheses. This means that one can actually carry out the intent of the question reflected by the hypothesis. For example, let's consider number of hours of parental reading and outcome scores as measured by a test of comprehension are all objective and can be incorporated reliably.

Hence, a a good hypothesis contradicts prior hypothesis.

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A) The carbon-carbon triple bond in C2H2 (ethyne or acetylene) results in the shortest carbon-carbon bond length. acetylene and HCCH.

The shortest C-to-C bond is found in the triple-bonded compound ethyne. Triple bonds are shorter than single bonds, whereas the other molecules only have single C-to-C bonds.

This is due to the fact that higher s character means that the electrons in bound pairs are tightly kept together, making the bond length short and strong. C 2 H 6 is hybridizing.

Two carbon atoms in acetylene are joined together by a triple bond. This is how its structure is displayed.

H-C=C-H

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Properties of matter, such as mass, classified as an extensive property because the mass of a substance depends on how much of the substance is present. Hence, option C is correct.

An extensive property is defined as a property that depends on the amount of matter in a sample. Mass and volume are the important examples of extensive properties. An intensive property is defined as a property of matter that depends only on the type of matter in a sample and not on the amount.

Extensive properties usually vary with the amount of the substance and include mass, weight, and volume. Intensive properties, basically, do not depend on the amount of the substance; they include color, melting point, boiling point, electrical conductivity, and physical state at a given temperature.

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Answer:

A Combustibility