a pure substance which can only be separated into two or more simpler substances using chemical changes is called

TheThe mass percent of HOCH2CH2OH is 6.85%

Mass of solute (ethylene glycol) = 3.2 g

Mass of solvent (water) = 43.5 g

Mass of solution = Mass of solute + Mass of solvent = 3.2 + 43.5 = 46.7 g.

Mass%= mass of solute×100/mass of solution

Mass%=3.2×100/43.5 = 6.85%

What is the relationship between solute and solvent?

To know more about solute and solvent, click the link given below:

httpshttps://brainly.com/question/16122098

#SPJ4

The complete overall reaction is represented below:

Pyruvate +Co-A+NAD+ → Acetyl Co-A+ NADH+CO2

ATP,ADP are 2 components that are not used.

This reaction is catalyzed by pyruvate dehydrogenase. This enzyme binds with the p and breaks some bonds as well as make some bonds to produce final products. After the conversion of pyruvate to the acetyl Co-A, this compound enters into mitochondria and enter into Krebs cycle to make energy. The pyruvate dehydrogenase complex (PDC)three catalyzes the oxidative decarboxylation of pyruvate with the formation of acetyl-CoA, CO2 and NADH (H+) (1,–three). The PDC occupies a key role withinside the oxidation of glucose via way of means of linking the glycolytic pathway to the oxidative pathway of the tricarboxylic acid cycle.

To learn more about pyruvate check the link below:

https://brainly.com/question/16346028

#SPJ4

Dispersion force act between a carbon dioxide molecule and a hydrogen iodide molecule.

Intermolecular interactions known as London dispersion forces typically act between atoms and molecules that are electrically symmetric, meaning that the electrons are evenly distributed around the nucleus. The van der Waals forces include them. The LDF bears Fritz London's name, a German physicist.

The least powerful intermolecular force is the London dispersion force. When the electrons in two nearby atoms occupy positions that cause the atoms to temporarily form dipoles, the consequence is the London dispersion force, a transient attractive force. The term "induced dipole-induced dipole attraction" is frequently used to describe this effect.

For more information on dispersion force kindly visit to

https://brainly.com/question/7290121

#SPJ4

The mass of oxygen needed to react 10.0g of calcium to form calcium oxide is 4 g.

The data given in the question is;

mass of the calcium = 10 g

As we know that

atomic mass of oxygen = 16 g/mol

atomic mass of calcium = 40 g/mol

The given chemical reaction;

2Ca + O2 → 2 CaO

from the reaction above we can deduce the following;

80 g of calcium : 32 g of oxygen

10 g of calcium :   ?

10 × 32 / 80 = 4g

Thus, the mass of oxygen needed to react 10.0g of calcium to form calcium oxide is 4 g.

To look more about calcium oxide click here

brainly.com/question/20417380

#SPJ4

1. If the density of your unknown liquid is 0.65 g/mL, calculate the volume in liters that 3 mL of your unknown liquid would occupy when vaporized at the barometric pressure and temperature of your boiling water bath in Run 1. Use the accepted molar mass of your suspected unknown: (0/1pts) Volume occupied when vaporized (L_ 3x0.65 (-1.0 pts) Incorrect. Convert from volume of liquid to moles of unknown using the density; 0.65 g.mL, and accepted molar mass for the suspected unknown: Do not use your experimentally determined molar mass. Once you have determined the moles of unknown; use the ideal gas law to determine the volume in liters that the gas will occupy once vaporized. Make sure to use the temperature of the water bath from Run 1 in Kelvin and the barometric pressure you recorded, in atm: (1/1pts) Based on the volume of the flask (L) from run 1, was 3 mL sufficient liquid to use in your experiment? yes

9.30 mol of iron (II) nitrate will contain a total of 27.9 mol ions.

Iron (II) nitrate is made of two ions:

The compound ionizes according to the following equation:

[tex]Fe(NO_3)_2 --- > Fe^{2+} + 2NO_3^-[/tex]

In other words, 1 mole of iron (II) nitrate produces 1 iron ion and 2 nitrate ions.

Now, there are 9.3 moles of iron (II) nitrate. If 1 mole gives 1-mol 27.9 mol and 2-mol nitrate ions, then 9.3 moles will give:

9.3 mol iron ions

9.3 x 2 = 18.6 mol nitrate ions

Total number of ions = 9.3 + 18.6

                                   = 27.9 mols

In other words, the total number of ions in 9.30 mol of iron (II) nitrate would be 27.9 mol.

More on stoichiometric calculations can be found here: https://brainly.com/question/29841194

#SPJ1

The magnetic quantum range or ml describes the orientation in area of a specific orbital. It is SP2 hybridisation for Argon and the no. of electrons are 2.

The feasible values of ml may be decided in view that it is able to handiest be an integer withinside the range l±1. If ml is 0 then the price of l can handiest be same to 0. If the price of the azimuthal quantum range is 0, this corresponds to the s orbital.

Thus, you handiest want to matter the electrons which might be withinside the s orbitals of the argon atom. The electron configuration of Argon is given below. There are 6 electrons which have ml=0 in view that there are 6 electrons in s orbitals (1s, 2s and 3s)

Ar:1s22s22p63s23p6.

Read more about the atom:

https://brainly.com/question/860094

#SPJ4

Fatty acid is a crucial part of lipids, which are the parts of living things including plants, animals, and microbes that may be dissolved in fat. Therefore, fatty acid synthesis involves that are discussed below.

A fatty acid is made up of a linear chain with an even amount of carbon atoms, hydrogen atoms all along the of the chain, a carboxyl group (COOH) at one end, and hydrogen atoms running the other end of the chain.

Fatty acid synthesis involves following steps

begins with  carboxylation of acetyl-CoA  

takes place in the cytoplasm

intermediates are linked to acyl carrier protein

use of NADPH

have a series of condensation

reduction and dehydration reactions.

Therefore, fatty acid synthesis involves that are discussed above.

To know more about fatty acid, here:

https://brainly.com/question/5710423

#SPJ1

moles of carbon monoxide is 0.277 moles.

If a container of of 14.0l Hold 0.6725mol.

[tex]n_{1\\}[/tex] = 0.625i

[tex]v_{1}[/tex] = 14.0l

container 2; [tex]v_{2}[/tex] = 8.01l;

let [tex]n_{2}[/tex] be find moles at constant pressure and temperature by Ideal gas equation,

[tex]\frac{v_{1} }{n_{1} }[/tex] = [tex]\frac{v_{2} }{n_{2} }[/tex]

[tex]\frac{14}{0.625}[/tex] = [tex]\frac{8.01}{n_{2} }[/tex]

[tex]n_{2}[/tex] = 0.358 moles

hence, moles of carbon monoxide escaped

=0.625-0.358

=0.277moles

mole, also spelled mol, in chemistry a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules or other specified particles. The mol designates an extremely large number of units, [tex]6.02214076*10^{23}[/tex].

Carbon monoxide (chemical formula CO) is a colorless, non-toxic, odorless, tasteless, combustible gas that is slightly less dense than air. Carbon monoxide is a triple bond between a carbon atom and an oxygen atom.

Learn more about mole here:

https://brainly.com/question/24900187

#SPJ4

To determine volume, we must work with density. But firstly we have to know the mass.

Density = mass/volume

Ratio is 2:1

CO density = CO mass / CO volume

1.18×10⁻³g/mL = CO mass / 0.626 L

First we must convert 0.626L to mL, because the units of density

0.626L = 626 mL

1.18×10⁻³g/mL = CO mass / 626 mL

CO masa = 1.18×10⁻³g/mL . 626 mL → 0.741 g

Let's convert to moles, the mass of CO ( mass . molar mass)

0.741 g / 28 g/mol = 0.0264 moles

As ratio is 2:1, we would need the half of moles, so (0.0264 / 2) = 0.0132 moles are required for the reaction.

Let's convert the moles to mass (molar mass  . moles)

32 g/mol . 0.0132 mol = 0.423 g

Now, we can work with oxygen density

O₂ density = O₂ mass / O₂ volume

1.43×10⁻³g/mL = 0.423g / O₂ volume

O₂ volume =  0.423g / 1.43×10⁻³g/mL → 296 mL

0.358 moles

hence, moles of carbon monoxide escaped will be

0.625 - 0.358 = 0.277moles

Therefore, the moles will be 0.277 moles.

To know more about moles, refer: https://brainly.com/question/26416088

#SPJ4

The option (b) is correct - 3.11 g.

What is concentration?

(KON-sen-TRAY-shun) The quantity of a substance, like salt, that is present in a specific volume of tissue or liquid, like blood, according to scientific definition.

What is mass?

Although grams can be used to measure lower quantities instead of kilograms, which is the standard SI unit for mass (g). Using a balance would be necessary to determine mass.

Gives that

volume of solution = 350 ml

350/1000 l = 0.350l

concentration of na+ ions = 0.125m

concentration of mg2so4 = concentration of na/2

concentration of na2so4= 0.125/2m= molarity

moles of na2so4= m*v

o.125/2*0.350

0.021875 moles

molar mass of g na2so4= 142.04g/mol

mass g m na2so4 = molar mass * mole

142. 04* 0.021875

=3.11g

Therefore, option (b) is correct - 3.11 g.

Learn more about concentration from the given link.

https://brainly.com/question/14469428

#SPJ4

The effects of transition are: absorption of energy and release of energy

Transition of matter is defined as the conversion of matter from one phase to another. The three states of matter i.e solid, liquid and gas are interconvertible in nature.

Melting, freezing and evaporation are the three phases of transition. And these transition occurs as a result of absorption of energy and release in energy, which also results in the change of shape of the matter.

Melting of ice takes place by absorption of energy. Freezing of water into ice takes place by releasing energy and on evaporation also, energy is released.

To know more about effects of transition here

https://brainly.com/question/19983755

#SPJ4

Sodium hydroxide reacts with sulphuric acid and has chemical formula is Naoh+h2so4 producing the product of (NaSO4+H2O) Sodium sulphate and water. This is an acid-base reaction and the product obtained is in the form of salt and water. Sodium sulphate is salt(product of neutralisation reaction).

Sodium hydroxide is an inorganic and strong base which is also known as caustic soda. The chemical formula of sodium hydroxide is NaOH and Sulphuric acid is strong acid with chemical formula H2So4.

When Both H2So4 and NaOH combine, the  acid-base reaction will occur. Sodium hydroxide is a base that reacts with an acid, i.e., sulfuric acid to give respective salt and water as the product where Sodium sulphate is salt as a product . The reaction is an example of a neutralisation reaction.

To know more about Neutralisation reaction visit here ; https://brainly.com/question/23008798?referrer=searchResults

#SPJ4

If the conventional hydrogen electrode is connected to the zinc half-cell, the zinc will be substantially more negative because the released electrons when zinc is oxidized will concentrate on the metal.

Zinc has a stronger tendency than hydrogen to generate ions (to be oxidized). The elements in the electrochemical series are grouped in accordance with their reduction potential. Zinc has a reduction potential of 0.76 volts, while iron has a reduction potential of 0.44 volts. As a result, zinc has a large negative reduction potential while iron has a low one. The electrode has a higher propensity to experience oxidation when the standard reduction potential is negative because it will rapidly lose electrons. As a result, it acts as a more powerful reducer than a hydrogen electrode.

To learn more about zinc click here https://brainly.com/question/13890062

#SPJ4

Answer:Nuclear

Explanation:

Answer: I am interested in Chemistry.

Calcium chloride is a better solution of salt to salt the roads.

In the countries where the climate is very cold, the solution of calcium chloride and water is mixed and used for clearing the ice on the road.

The mixture of calcium chloride CaCl₂ and water is called eutectic mixture.

This mixture has a very low freezing point in comparison to sodium chloride.

Sodium chloride NaCl, is also a good substitute for clearing ice but it has a much higher freezing point in comparison to calcium chloride.

This is why calcium chloride is always preferred over sodium chloride because it becomes easier for us to clean the roads.

To know more about calcium chloride, visit,

https://brainly.com/question/12216405

#SPJ4

At the state of equilibrium of the reaction,  the concentrations of reactants relative to the concentrations of products will be as follows [Reactants] = [Products].

In the field of chemistry, equilibrium is described as a state during which the amount of reactants is equal to the amount of product that is being produced from the reaction.

In other words there are equal number of moles of the reactants as well as equal number of moles of the products at the stage of equilibrium for a reaction.

While writing the state of equilibrium in a reaction, we will represent this stage as  [Reactants] = [Products]. After this stage of the reaction, more of the reactants will be utilized for the formation of products.

Learn more about equilibrium from the link given below.

https://brainly.com/question/29816521

#SPJ4

Hydrogen, when combined with oxygen in a chemical reaction, forms water. This is an example of Combination reaction.

Chemical reaction-In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products. Chemical elements or chemical compounds make up substances., Different types of reactions are Combustion reaction, Decomposition reaction, Neutralization reaction, Redox Reaction, Precipitation or Double-Displacement Reaction, Synthesis reaction.

Combination reactions is processes in which two or more substances or components come together to generate a single substance. Equations of the form X + Y XY serve as a representation for such reactions. A combination reaction is the joining of two or more components to create a compound.

LEARN MORE ABOUT chemical reaction HERE

https://brainly.com/question/11231920

#SPJ4

The process by which water is added to an aldehyde when a base is present, Being electrophilic makes this carbon atom vulnerable to nucleophilic attack; in contrast, oxygen is more electronegative.

An atom's or functional group's propensity to draw electrons to itself is known as electronegativity, which is a chemical property. An atom's electronegativity is influenced by both its number of atoms and the separation of its valence electrons from its charged nucleus.

The capacity of an atom in a covalent connection to pull shared electrons is known as electronegativity. The value of an element's electronegativity determines how strongly it will attract electron pairs.

To know more about electronegative visit:

https://brainly.com/question/17762711

#SPJ4

The percentage by mass of acetic acid is 5.14%

What is percentage by mass?

It is defined as ratio of mass of substance to the mass of all substance multiply by 100.It is way to express concentration.

CH3COOH+NaOH= CH3COONa+H2O

we have 1 mole of acid for 1mole of base

Now , C=n/V

C= 0.299M ( its M not m so correct question)

V= 24.5 mL

no of moles = 0.299moles/L × 0.0245 L = 0.00733 moles

for neutralization of 0.00733 moles of Noah require 0.00733 moles  of CH3COOH

given mass of acetic acid = no. of moles × molar mass

0.00733×60g/mole = 0.4398g

% mass of acetic acid =[ 0.4398g/8.55g]×100

⇒ 5.14%

For more information about mass percentage please visit:

https://brainly.com/question/27574467

#SPJ4

The atomic radius change across a period from left to right in the periodic table is decreases.

When me move up to the period from the left to the right in the periodic table the number of the shells across the period will not change the number of shell will remains the same so the nucleus will attract the outermost shell electrons to towards itself and the effective nuclear charge will increase , the increase shielding effect across the period is negligible so the atomic radius decrease.

Thus, as the effective nuclear charge increase , the ionization enthalpy also increases and the atomic radius will decreases.

To learn more about atomic radius here

https://brainly.com/question/29440273

#SPJ4

Holding a toast  will not help in preventing Johny from dying of hypothermia as the thermal energy produced by holding a hot toast is not sufficient to maintain the thermal energy of the body.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

Learn more about thermal energy,here:

https://brainly.com/question/11278589

#SPJ1

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the moles and number of molecules of ibuprofen is 0.15moles and 9.03×10²²molecules respectively.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

given mass of ibuprofen= 33 g

Molar mass of ibuprofen= 206.29 g/mol

mole of ibuprofen=33 g ÷ 206.29 g/mol

mole of ibuprofen=0.15moles

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

number of atoms/molecules of ibuprofen= 0.15× 6.022×10²³

                                                                   =9.03×10²²molecules

Therefore, the moles and number of molecules of ibuprofen is 0.15moles and 9.03×10²²molecules respectively.

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ1

The proportionality constant that links the quantity of servings to cups of cheese is 0.25.

In a recipe that serves 10, Sarah used 2.5 cups of cheese, which is equivalent to:

Let c represent the number of cheese cups: c = 2.5 cheese cups

Let n represent the total number of clients served.

The equation is then expressed as follows:

c ∝ n

then we can introduce the sign for the proportionality constant as;

So, c = kn

then we may enter the given numbers as follows into the equation:

=> 2.5=k (10) (10)

The constant's value can be calculated as follows:

= k=2.5/10

= 0.25

Therefore, 0.25 is the constant of proportionality that links the quantity of servings to cups of cheese.

To know more about moles, visit:

https://brainly.com/question/26416088

#SPJ4

The transfer of energy by heat from colder bodies to hotter bodies is the perfect example for entropy of a spontaneous reaction.

Spontaneous reactions are described as those chemical or biological reactions that usually take place without the influence of external factors. Non- Spontaneous reactions are described as those chemical reactions that generally requires an energy input to proceed or that cannot take place without the influence of external factors.

The transfer of energy by heat from colder bodies to hotter bodies is an example of spontaneous process in which the entropy of the system of bodies increases. The melting of the ice cube placed in a room causes an increase in the entropy of the room.

Learn more about spontaneous reaction from the link given below.

https://brainly.com/question/29821533

#SPJ4

This rock is 20,000 years old if the radioactive isotope it contains has a half-life of 10,000 years.

Not all of an element's atoms instantly transform into atoms of another element during natural radioactive decay. There is value in being able to express the rate at which a process occurs since the decay process takes time. Within one half-life, the amount of radioactive nuclei present at any particular time will be reduced to half. The procedure of radioactive dating involves using certain radioactive nuclides to establish an object's approximate age.

Age = nxt1/2 is the formula used to determine an object's age using isotope dating, where n is the quantity of half-lives.

To learn more about  radioactive isotope click here https://brainly.com/question/29611802

#SPJ4

A structure containing a central atom surrounded by three electron groups will have a Trigonal planar arrangement in which the ideal bond angle is 120 °.

What is Central Atom?

The ligands in coordination chemistry, as was previously mentioned, either have a single pair of electrons or a negative charge. As a result, they have an excess of electron density that can be donated to the metal's open orbital. The centre atom is the metal atom to which the ligands bond. The central ion is the metal ion to which the ligands attach. As an illustration, the core ion in K3[Fe(CN)6 is Fe3+. These core atoms and central ions serve as Lewis acids, or acceptors of the electron pair.

As d-block elements function as central atoms and central ions in coordination complexes, we must thoroughly comprehend transition metals in order to comprehend this.

Learn more about Central Atom from given link

https://brainly.com/question/29078422

#SPJ4

When solid sodium hydroxide dissolves in water, δh for solution process is −44.4 kj/mol  then final temperature of the solution is 23.758  °C

q=mc(T2-T1)

T2=q/mc+t1

T2= -44/13.9×4.18+23

T2=23.758  °C

Temperature is the unit used to describe heat or cold. It illustrates the natural flow of heat energy from a hotter to a cooler body and can be expressed in terms of a variety of arbitrary scales (one at a lower temperature). An iceberg has a much higher total heat energy than a match, despite the fact that a match burns at a much higher temperature. Temperature and a thermodynamic system's energy are not the same thing. In contrast to extensive features like mass or volume, such as temperature is referred to as an intense property—one that is independent of the amount of material being addressed—along with pressure, density, and other similar qualities.

To know more about  temperatures  visit : https://brainly.com/question/10576021

#SPJ4

Transition means change of one phase of matter into another.

Matter is interconvertible in nature. There are three phases of transition: Melting, freezing and evaporation.

The process of conversion of solid form of matter into liquid form is known as melting. Examples of melting are such as: melting of ice, melting of wax etc.

The process of conversion of liquid form of matter into solid form is known as freezing. Formation of ice is an example of freezing.

And, the process of conversion of liquid form of matter into gaseous form is known as evaporation. Boiling of water is an example of evaporation.

To know more about transition here

https://brainly.com/question/17283694

#SPJ4