why are being flammable and combustible be considered to be chemical properties and not physical properties?

Answer:

B and C

Explanation:

Sulphuric acid reacts with lithium hydroxide to produce lithium sulphate and water

H2SO4 + 2LiOH ---› Li2SO4 + 2H2O

Explanation:

it helps in when the kidney has used the needful nutrients been taken then the unwanted waste product it sends it to the nervous system then the nervous system passes the waste product to the bladder in form of urine

Answer:

Meiosis

Explanation:

This is The process of cell division in which the resulting cells have half the chromosomes number of the parent cell.

An electron in a 4p orbital can have a wave function with quantum numbers (4, 1, -1, -1/2). The answer is B.

The principal quantum number (n) can range from 1 to infinity. The azimuthal quantum number (l) can range from 0 to n-1. The magnetic quantum number (m) can range from -l to l. The spin quantum number (ms) can be either +1/2 or -1/2.

For a 4p orbital, n = 4, l = 1, m = -1, 0, or 1, and ms = +1/2 or -1/2. Therefore, the only set of quantum numbers that is possible for an electron in a 4p orbital is (4, 1, -1, -1/2).

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Answer:

True

Explanation:

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.

For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water which bypasses the conversion to liquid stage and goes straight to the gaseous form.

The phrase that describes transmutation is ; ( A ) The conversion of an atom of one element into different element through nuclear changes.

Transmutation is simply the change of an element to another element, transmutation occurs at the nucleus of the atom of an element and this process is initiated through nuclear reaction ( radioactive decay ).

Therefore the conversion of an atom of one element into different element through nuclear changes summarizes the term "transmutation".

Hence we can conclude that the phrase that describes transmutation is  the conversion of an atom of one element into different element through nuclear changes.

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Answer:

Unit 4 Lesson 2:

Energy Release Quick Check

1. 138

2. The conversion of an atom of one element into a different element through nuclear changes.

3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.

4. 82

5. Some of the matter is converted to energy.

Please give me Brainliest. You're Welcome

Answer:

Explanation:

Aliphatic compounds are those hydrocarbons that are the open chain compounds and also closed chains. Aromatic compounds are those who have only a closed chain structure. They can be saturated as well as unsaturated where the system can be open as well as closed chain.

Answer

27.59 is the answer

Answer:

I love Science anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Explanation:

Explanation:

A covalent bond is formed by the overlap of half filled atomic orbitals of different atoms. Overlapping atomic orbitals must have electrons with opposite spins. The bonded electron pair is localized between two linked atoms. The stability of covalent bond is due to exchange of valence electrons between participation atoms, which lowers potential energy of the bonded atoms. Each atom of the compound attains a noble gas configuration.

This is for the advanced class

Hope it helps

A molecule of ethanol (C2H6O) is composed of 9 atoms.

Breaking down the molecular formula: C2H6O

There are 2 carbon atoms (C2).

There are 6 hydrogen atoms (H6).

There is 1 oxygen atom (O).

In total, the molecule of ethanol contains 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom, summing up to a total of 9 atoms.

A molecule of ethanol (C2H6O) consists of 2 carbon atoms (C), 6 hydrogen atoms (H), and 1 oxygen atom (O). Therefore, there are a total of 2 + 6 + 1 = 9 atoms in a molecule of ethanol.

Adding up the individual atoms, we get a total of 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom, which sum up to 9 atoms in total.

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The oxidation number of Na in the compound Na2CO3 is +1.

To determine the oxidation number of Na in Na2CO3, we need to consider the known oxidation numbers of other elements and the overall charge of the compound.

1. The compound Na2CO3 contains two Na atoms and one C atom, along with three O atoms.

2. Oxygen (O) typically has an oxidation number of -2, unless it is in a peroxide where it is -1.

3. Carbon (C) is more electronegative than hydrogen (H) but less electronegative than oxygen (O), so it usually has an oxidation number of +4 in compounds.

4. The compound Na2CO3 has a neutral charge, which means the sum of the oxidation numbers of all the elements must be zero.

5. Let's assign the oxidation number of Na as x. Since there are two Na atoms, the total oxidation number contribution from Na is 2x.

6. The oxidation number of C in CO3 is +4, and the oxidation number of O is -2. Since there are three O atoms in CO3, the total oxidation number contribution from O is 3*(-2) = -6.

7. Setting up the equation: 2x + 4 + (-6) = 0.

8. Solving the equation: 2x - 2 = 0, 2x = 2, x = 1.

Therefore, the oxidation number of Na in Na2CO3 is +1.

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The ion released by alka-seltzer to change the pH of the solution is the hydroxide ion (OH-). When alka-seltzer is added to water, it undergoes a chemical reaction that releases hydroxide ions.

These hydroxide ions then react with the water molecules, resulting in an increase in the concentration of hydroxide ions in the solution. This increase in hydroxide ion concentration leads to an increase in pH, making the solution more basic. The pH scale ranges from 0 to 14, with a pH of 7 considered neutral, values below 7 acidic, and values above 7 basic.

Since the final pH of the solution after adding alka-seltzer is 8.3, it indicates that the solution has become more basic due to the release of hydroxide ions. In summary, when alka-seltzer is added to water, it releases hydroxide ions, which react with water to increase the concentration of hydroxide ions and raise the pH of the solution. When alka-seltzer is added to pure water, it dissolves and undergoes a chemical reaction. This reaction results in the release of hydroxide ions (OH-) into the solution.

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Answer:

\( moles = \frac{ number \: of \: particles}{6.02 \times {10}^{23} } \)

=1.806×10^22/6.02×10^23

=0.03 moles

hope this helps :)

The equation for the hydrolysis of glyceryl triethanoate is C3H5(OH)3 + 3CH3COOH = C3H3(OCOCH3)3 + HOCH2CH(OH)CH2OH

Hydrolysis is a chemical reaction which water molecule break down one or more chemical bonds. This is use for substitution, elimination, and solubility.

Hydrolysis depend on the pH, solubility and chemical constituent of the substance.

Therefore, The equation for the hydrolysis of glyceryl triethanoate is C3H5(OH)3 + 3CH3COOH = C3H3(OCOCH3)3 + HOCH2CH(OH)CH2OH

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Explanation:

i.e M = m/V(L)

M= Molarity of substance

m = number of moles of substance (i.e solute)

V(L) = volume of solution in Litres

So talking about our question molarity should be 0.5 M,volume should be 0.1 L , and we should know that Molar Mass of NaOH is 40 because Atomic mass of Sodium i.e (Na known as Natrium) is 23,Atomic mass of Oxygen (O) is 16 and Atomic mass of Hydrogen is 1.

Adding them all up gives Molecular mass of NaOH as 40

So if we solve above equation we get no of moles of NaOH present in 0.1 litres of solution

Let’s do that math

Rearranging equation we get m=M×V(L) i.e m= 0.5×0.1 =0.05. So 0.05 moles of NaOH are present in 100 ml of 0.5 Molar solution

Now we also know that to find no of moles of a substance we have a formula and it is m=W/Mw where

m = no of moles of a substance

W = Mass of substance

Mw = Molecular weight of the substance

So substituting all values and rearranging equation we get mass of NaOH as

W=m×Mw = 0.05×40=2 grams

Hence we found the required mass of NaOH as 2 grams.

Now talking about shortcut

we know as explained above M=m/V(L) and m=W/M

Substituting value of m(no of moles) in M=m/V(L) we get M=WMw×V(L)

Try substituting the values yourself and get the answer

Note :: The value of Volume should always be substituted in terms of Litre only. That is the reason i used the letter (L) at all the places with V

So thats all get the answer and comment any other problems below

Hope you got your problem solved

Thanks!!!

The amine with the highest boiling point is A. Primary amine.

Amines are organic compounds that contain a nitrogen atom bonded to one or more alkyl or aryl groups. The boiling point of an amine is determined by the strength of the intermolecular forces present.

Primary amines have the strongest intermolecular forces due to the presence of a hydrogen atom bonded to the nitrogen atom, which allows for hydrogen bonding.

Secondary and tertiary amines do not have this hydrogen atom and therefore have weaker intermolecular forces, resulting in lower boiling points.

Therefore, the correct answer is A. Primary amine, as it has the strongest intermolecular forces and therefore the highest boiling point.

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1) Which element is oxidized

Oxidation numbers

I2: 0

ClO3-: for Cl +5 and for O is -2

IO3-: for I is +5 and for O -2

Cl-: -1.

According to the oxidation number

a. Iodine (I) has been oxidized. It changed from 0 to +5.

b. Chlorine has been reduced. It changed from +5 to -1

2) reducing agent and oxidizing agent

c. A reducing agent donates electrons. In the reaction, Iodine is the reducing agent.

d. An oxidizing agent accepts electrons. In the reaction, Chlñorine is the oxidizing agent.

3) Balancing the chemical equation

Step 1: break the reaction into two half-reactions.

Oxidation half-reaction

Reduction half-reaction

Step 2: balance all elements EXCEPT for hydrogen and oxygen

Oxidation half-reaction

Reduction half-reaction

Step 3: Balance OXYGEN. We do so by adding water molecules to the half-reactions as needed.

Oxidation half-reaction

Reduction half-reaction

Step 4: Balance HYDROGEN. We do so by adding protons (H+) to the half-reactions as needed.

Oxidation half-reaction

Reduction half-reaction

Step 5: Balance CHARGES. We do so by adding electrons

Oxidation half-reaction

Reduction half-reaction

Step 6: Multiply each half-reaction in such a way we can cancel the electrons.

Oxidation half-reaction

New oxidation half-reaction

Reduction half-reaction

New reduction half-reaction

Step 7: combine the half-reactions. We have 30e in the reactants and 30e in the products. We can cancel them and combine the remaining species.

New oxidation half-reaction

New reduction half-reaction

Overall reaction

Step 8: Balance the reaction by reducing the number of water molecules and protons.

Overall reaction

e. Balance the reaction

.

Answer:

the correct answers is "neutralize"

Explanation:

When an acid is related to a base or also called an alkali and they reach a pH of 7, this acid will be neutralized or it will be canceled as the question says.

This happens so it reaches an equilibrium between both compounds, where the solution medium where these two compounds are is NEITHER ACID NOR BASIC, that is why it is called NEUTRAL medium.

Whenever you read that the pH of a solution is balanced, a neutralized acid, or a ph7 it means that the solution is NEUTRAL.

3741.3 J is the total random kinetic energy of all the molecules in one mole of hydrogen at a temperature of 300 k.7482.6 m/s is the speed of a mole of hydrogen have to move so that the kinetic energy of the mass as a whole would be equal to the total random kinetic energy of its molecules

At 300 K, the total random kinetic energy of all the molecules in one mole of hydrogen is 3741.3 J. The speed at which a mole of hydrogen must move in order for its kinetic energy to equal the total random kinetic energy of its molecules is 7482.6 m/s. The average kinetic energy of gas molecules is determined by absolute temperature, according to kinetic theory. At a specific temperature, all gases share the same average kinetic energy". Kinetic energy = 3/2 * RT = 3/2 8.314 * 300 = 3741.3 J,KE = 1/2 m v2,v2 = 2 KE/m = 2* 3741.3/1.

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The volume of the gases after combustion would be determined by the Ideal Gas Law (PV = nRT).

W = -P(ΔV) = -650.0 torr * (Vf - Vi) = -950.0 J

where Vf is considered to be the final volume and Vi to be the initial volume.

So, Vf - Vi = -950.0 J / -650.0 torr = 1.4615 cm3

Therefore, the final volume of the gases would be

Vf = Vi + ΔV = 40.0 cm3 + 1.4615 cm3 = 41.4615 cm3

The ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equivalent to the product of the absolute temperature of gas and the universal gas constant.

Ideal gas is a theoretical gas which obeys the Ideal Gas Law at all conditions of temperature and pressure. Those gases which exist in the environment are Real Gases. Only under the situations of high temperature and low pressure, real gases follow Ideal Gas Law. Therefore, it proves that ideal gas is not a real gas.

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In the distillation of a pure material, all of the pure material not vaporize once the boiling point is reached because more heat would need to be added to the distillate in order to vaporize the liquid from its boiling point.

During distillation, the process of vaporizing a liquid and collecting the resulting vapor as a purified substance, it is important to consider the energy requirements involved.

When a liquid reaches its boiling point, it undergoes a phase change from the liquid phase to the gas phase. This phase change requires the input of energy in the form of heat. The heat breaks the intermolecular forces holding the liquid molecules together, allowing them to transition into the gas phase.

The heat required to vaporize a liquid is not solely determined by the boiling point. The heat required to convert a liquid into a gas is known as the heat of vaporization, and it varies depending on the substance.

When distilling a liquid, such as water, the heat of vaporization must be supplied to convert the liquid into vapor. This energy is absorbed by the liquid, and it is essential to provide continuous heating to maintain the distillation process.

As the liquid is heated and reaches its boiling point, vaporization begins. However, the rate at which the liquid vaporizes depends on the amount of heat being supplied. If the heat input is insufficient, the vaporization process will be slower, and not all of the liquid will vaporize at once.

To ensure the complete vaporization of a liquid during distillation, a sufficient amount of heat must be continuously applied to the system. This allows the heat of vaporization to be continually supplied to the liquid, facilitating the conversion of the entire liquid into vapor.

If the heat input is insufficient, the vaporization process will be slower, and the liquid may not vaporize all at once. Providing adequate and continuous heating is crucial to ensure the complete conversion of the liquid into vapor during distillation.

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Covalent compound are not the products of neutralization reactions. The products of a neutralization reaction are water and an ionic compound, typically a salt.

A neutralization reaction is a chemical reaction that occurs when an acid and a base react together. In this reaction, the hydrogen ion (H+) from the acid combines with the hydroxide ion (OH-) from the base to form water (H2O). The remaining ions combine to form an ionic compound, which is commonly referred to as a salt.

Ionic compounds are composed of positively and negatively charged ions, which are formed when one or more electrons are transferred from one atom to another. These compounds typically consist of a metal cation and a nonmetal anion.

On the other hand, covalent compounds are formed when two or more atoms share electrons to form a molecule. Covalent compounds are commonly formed between nonmetals and are characterized by the sharing of electrons within the molecule.

Examples of covalent compounds include water (H2O), carbon dioxide (CO2), and methane (CH4). These compounds are formed through the sharing of electrons between atoms rather than the transfer of electrons as in ionic compounds.

In summary, covalent compounds are not the products of neutralization reactions. The products of a neutralization reaction are water and an ionic compound, typically a salt. Covalent compounds are formed through the sharing of electrons between atoms and are generally composed of nonmetals.

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The higher the concentration of OH- ions, the more basic the solution becomes.Finally, a solution is considered to be neutral if the concentration of H+ ions and OH- ions are equal. In this case, the pH value of the solution is 7.

The concentration of hydrogen ions (H+) and hydroxide ions (OH-) determine whether a solution is acidic, basic or neutral. The pH scale ranges from 0 to 14. If the pH value of a solution is less than 7, it is acidic. If the pH value is greater than 7, it is basic. If the pH value is equal to 7, it is neutral.A solution is considered to be acidic if it has a higher concentration of H+ ions and a lower concentration of OH- ions. In an acidic solution, the concentration of H+ ions is greater than the concentration of OH- ions. The higher the concentration of H+ ions, the more acidic the solution becomes.On the other hand, a solution is considered to be basic if it has a lower concentration of H+ ions and a higher concentration of OH- ions. In a basic solution, the concentration of OH- ions is greater than the concentration of H+ ions. The higher the concentration of OH- ions, the more basic the solution becomes.Finally, a solution is considered to be neutral if the concentration of H+ ions and OH- ions are equal. In this case, the pH value of the solution is 7.
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Some of the acids and bases included in the Arrhenius theory are not acids and bases according to the Bronsted-Lowry theory. The statement is true.

The Arrhenius theory defines an acid as a substance that produces hydrogen ions (H+) in water, and a base as a substance that produces hydroxide ions (OH-) in water. However, according to the Bronsted-Lowry theory, an acid is a substance that donates a proton (H+) to another substance, while a base is a substance that accepts a proton. Therefore, some substances that may be considered acids or bases according to the Arrhenius theory may not fit the definition of an acid or base according to the Bronsted-Lowry theory.

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Answer:

C+O2=CO2

Explanation:

During combustion the reaction is formed.

The mass of 8.42 x 10^22 atoms of sulfur is approximately 4.4876 grams.

To calculate the mass of atoms, we need to know the molar mass of the element. The molar mass of sulfur (S) is approximately 32.06 grams per mole.

Given that you have 8.42 x 10^22 atoms of sulfur, we can use this information to determine the mass.

First, we need to convert the number of atoms to moles. We know that 1 mole of any substance contains Avogadro's number (6.022 x 10^23) of atoms.

So, to find the number of moles of sulfur, we divide the given number of atoms by Avogadro's number:

Number of moles = (8.42 x 10^22 atoms) / (6.022 x 10^23 atoms/mol)

Number of moles ≈ 0.140 moles

Now, to find the mass in grams, we multiply the number of moles by the molar mass of sulfur:

Mass = (0.140 moles) * (32.06 g/mol)

Mass ≈ 4.4876 grams

Therefore, the mass of 8.42 x 10^22 atoms of sulfur is approximately 4.4876 grams.

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Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Answer:

0.75 M

Explanation:

Molarity = moles of solute / liters of solution

so;

Molarity = \(\frac{1.5 Moles}{2.0 Liters}\)

According to molar concentration, the molarity of this solution is 0.75 molar.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in formula gives, molarity= 1.5/2=0.75 M

Thus,  the molarity of this solution is 0.75 molar.

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