What is the molarity of the solution formed by mixing 0. 20 moles of sodium hydroxide (naoh) with enough water to make 150 l of solution?.

ΔH for the neutralization of 1 mol of H+ by 1 mol of OH- is approximately 0.005 kJ.

(a) To calculate the calories of heat liberated by the combustion of isobutane, we can use the formula:

\(q = m * C * ΔT\)

where:
q = heat energy (calories)
m = mass of substance (in this case, isobutane) = 0.100 mol
C = heat capacity of the calorimeter = 97.1 ∘C kJ
ΔT = change in temperature = 27.965 ∘C - 25.000 ∘C

Plugging in the values, we get:

\(q = 0.100 mol * 97.1 ∘C kJ * (27.965 ∘C - 25.000 ∘C)\)
\(q = 0.100 mol * 97.1 ∘C kJ * 2.965 ∘C\)
q = 29.06965 cal

Therefore, approximately 29.07 calories of heat were liberated by the combustion of isobutane.

(b) To calculate ΔE for the reaction expressed in mol kJ C4H10, we can use the formula:

\(ΔE = q / n\)

where:
ΔE = change in energy (mol kJ C4H10)
q = heat energy (calories) = 29.07 cal
n = number of moles of isobutane = 0.100 mol

Converting calories to joules, we get:

\(ΔE = (29.07 cal) * (4.184 J/cal) / (1000 J/kJ) / (0.100 mol)\)
ΔE = 0.1219712 mol kJ C4H10

Therefore, ΔE for the reaction expressed in mol kJ C4H10 is approximately 0.122 mol kJ C4H10.

5.) To calculate ΔH in kJ for the neutralization of 1 mol of H+ by 1 mol of OH-, we can use the formula:

\(ΔH = q / (n(H+) + n(OH-))\)
where:
ΔH = change in enthalpy (kJ)
q = heat energy (J)
n(H+) = number of moles of H+ = 1 mol
n(OH-) = number of moles of OH- = 1 mol

First, we need to calculate the heat energy (q) using the formula:

\(q = m * C * ΔT\)

where:
m = mass of the solution

= volume * concentration

= (200 mL + 200 mL) * (0.431 M + 0.862 M) = 0.3608 moles
C = specific heat of the solution = 4.184 g ∘C J
ΔT = change in temperature = 26.3 ∘C - 20.5 ∘C

Plugging in the values, we get:

q = 0.3608 moles * 4.184 g ∘C J * (26.3 ∘C - 20.5 ∘C)
q = 0.3608 moles * 4.184 g ∘C J * 5.8 ∘C
q = 9.6490784 J

Converting joules to kilojoules, we get:

q = 9.6490784 J / (1000 J/kJ)
q = 0.0096490784 kJ

Finally, plugging the values into the formula for ΔH, we get:

ΔH = 0.0096490784 kJ / (1 mol + 1 mol)
ΔH = 0.0048245392 kJ

Therefore, ΔH for the neutralization of 1 mol of H+ by 1 mol of OH- is approximately 0.005 kJ.

To know more about energy visit-

https://brainly.com/question/1932868

#SPJ11

Answer: 15 grams of magnesium will be present in the magnesium sulfate

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical reaction is:

\(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)

As the mass remains conserved at the end of the reaction, there will be 15 grams of Magnesium in magnesium sulphate.

Answer:

c

Explanation:

I believe its c but i could be wrong sorry if I am

Less evaporation means that less of the sun's energy is used to convert water into water vapor, and more of it is used to heat up the surface. In urban areas, there is typically less vegetation and more impervious surfaces (such as concrete and asphalt), which reduces the amount of water that can evaporate.

This means that more of the sun's energy is absorbed by the surface, leading to higher temperatures. Additionally, buildings and other structures in urban areas can trap heat and prevent it from dissipating, further contributing to the urban heat island effect.

In rural areas, vegetation and soil moisture play an important role in regulating temperature through a process called evapotranspiration. Evapotranspiration is the combined process of water evaporation from the soil and plant transpiration. It helps to cool the air by removing heat from the surface through the transfer of water from the surface to the atmosphere.

In contrast, urban areas have a significant amount of impervious surfaces like concrete, asphalt, and buildings, which reduce the amount of vegetation and soil moisture. As a result, urban areas have less evapotranspiration, which means less cooling effect from the evaporation of water. This leads to a higher surface temperature in urban areas.

Furthermore, urban areas have a higher proportion of dark-colored surfaces, such as asphalt and concrete, which absorb more solar radiation than lighter-colored surfaces like vegetation and soil. This is known as the "urban heat island effect," which further contributes to higher temperatures in urban areas.

For more question on evaporation click on

https://brainly.com/question/8944874

#SPJ11

Answer:

2 option

Explanation:

please mark me brainliest and 5 star

In order to answer this question we will use again the Avogadro's number, but now we are going to find out how many moles we have in 2.19*10^22 molecules of NaF

1 mol = 6.02*10^23 molecules

x moles = 2.19*10^22 molecules

x = 0.04 moles of NaF

Now that we have the number of moles, to find the mass we will need the molar mass of NaF, which is 42 g/mol, this means that for every mol of NaF, we will have 42 grams of it

42 g = 1 mol

x grams = 0.04 moles

x = 1.68 grams of Sodium fluoride, NaF

Density =mass/volume

=6/3

=2

What is the normality of H₂SO₄?

The normality of H₂SO₄ that was neutralized with 25 cc of NaOH is 1.1 N.

Molarity of 5% NaOH:

The molar mass of NaOH = 40.00

(Through density tables).

value of 5% NaOH solution density = 1.0554 g/mL.

∴ 10 × 5 × 1.0554/40.00 = 1.32 M.

Thus, Molarity of 5% NaOH = 1.32 M.

30 cc of H₂SO₄ the solution was neutralized with 25 cc of NaOH.

Reaction:

2 NaOH + H₂SO₄  → \(Na_{2}SO_{4}\) + 2\(H_{2}O\)

Molarity of H₂SO₄ = 1.32 × 1 × 25/(30×2) = 0.55 M.

Normality = Molarity × moles of H⁺ ions per mole of H₂SO₄

moles of H⁺ ions per mole of H₂SO₄ = 2

Normality of H₂SO₄ = 0.5 × 2 = 1.1 N.

Learn more about the normality here,

https://brainly.com/question/24233109

#SPJ4

Answer:

It is observed in various ways;

- Through electromagnetic waves:

Gamma rays, x-rays, ultraviolet rays and visible light are all electromagnetic.

- In electromagnetic devices

For example in motors and generator.

I'll describe that in a motor

Description;

\(.\)

Answer:

C: the repulsion of electrons and electrons.

Explanation:

According to the VSEPR theory, molecular shapes adjust so that the electrons can be as far apart as possible due to electrons repelling each other, which would mean the only possible answer is C.

For the given equation, the mole-to-mole ratio and volume-to-volume ratio for all the gaseous reactants and products are 1:1.

For the given equation:

CH4(g) + O2(g) → CO2(g) + H2O(g)

Reactant/Product:

CH4(g)

O2(g)

CO2(g)

H2O(g)

Mole-to-Mole Ratio:

By comparing the reactant and product coefficients, we may extract the mole-to-mole ratio from the balanced equation.

CH4(g): 1 mole

O2(g): 1 mole

CO2(g): 1 mole

H2O(g): 1 mole

All of the reactants and products have a mole-to-mole ratio of 1:1:1:1.

Ratio of Volume to Volume:

The ideal gas law, which states that under constant temperature and pressure, the volume of a gas is directly proportional to the number of moles in the gas, can be used to calculate the volume-to-volume ratio.

All gaseous reactants and products have a mole-to-mole ratio of 1:1, hence the volume-to-volume ratio will also be 1:1. As a result, the volume of drug A and substance B will be equal.

You can just take the volume of substance A as the value for substance B if you know the volume of substance A and are trying to solve for the volume of substance B. Alternatively, the quantity of substances A and Bwill be the same, given the 1:1 volume-to-volume ratio.

For more such questions on reactants visit:

https://brainly.com/question/26283409

#SPJ8

The general category for compounds like CO, CO2, SO2, NO, NO2, most hydrocarbons, and most suspended particles which are mixed vertically and horizontally in our atmosphere and then dispersed and diluted by churning before they react with other compounds is: air pollutants.

Air pollutants are any type of gaseous, solid, or liquid substance that are released into the atmosphere. These pollutants come from a variety of sources including industrial facilities, vehicles, and the burning of fossil fuels. They can also be naturally occurring and caused by events like volcanic eruptions.

Pollutants such as CO, CO2, SO2, NO, NO2, hydrocarbons, and suspended particles can enter the atmosphere in a variety of ways. In many cases, they can be released directly from an industrial facility or a vehicle. They can also be released as a result of chemical reactions that occur in the atmosphere or from other sources such as the burning of fossil fuels.

Once in the atmosphere, air pollutants can mix vertically and horizontally with other substances and be dispersed and diluted by churning. This churning process can cause pollutants to react with other compounds such as ozone and form secondary pollutants. These secondary pollutants are often more harmful than the original pollutants and can contribute to smog and acid rain.

Air pollution can have negative impacts on both human health and the environment. Some of these impacts include increased respiratory problems, decreased visibility, and reduced crop yields. To reduce the amount of air pollution, governments and businesses are working to reduce emissions and promote cleaner technologies.

In conclusion, compounds such as CO, CO2, SO2, NO, NO2, hydrocarbons, and suspended particles that are mixed vertically and horizontally in our atmosphere and then dispersed and diluted by churning before they react with other compounds are categorized as air pollutants. These pollutants can cause a variety of health and environmental issues if not managed properly.

To know more about hydrocarbons refer here:

https://brainly.com/question/30907363#

#SPJ11

Answer:

Question1: Isotopes, element, protons, neutrons. Question 2: W and Y

Explanation:

An Isotope is atoms of the same element that have a different amount of neutrons.

Both are Carbon atoms, but their Atomic Masses are different, and Atomic Masses are made up of Protons and Neutrons, which proves this!

Hope this helps! :D

Percentage by mass of chlorate 1 in calcium chlorate 1 is greater than the percentage by mass of chlorate 1 ions in Sodium chlorate.

An oxyanion is a polyatomic ion that contains at least one oxygen atom and one or more other elements, typically nonmetals. Examples of oxyanions include nitrate (NO3-), sulfate (SO42-), and phosphate (PO43-).

The molecular formula for calcium chlorate is Ca(ClO3)2, and the molecular formula for sodium chlorate is NaClO3.

To calculate the percentage by mass of chlorate 1 in calcium chlorate 1, we need to calculate the molar mass of Ca(ClO3)2 and the molar mass of chlorate 1.

Molar mass of Ca(ClO3)2 = 1 mol Ca + 2 mol ClO3

= 40.08 g/mol Ca + 2(35.45 g/mol Cl + 3(16.00 g/mol O))

= 238.06 g/mol

Molar mass of chlorate 1 = 35.45 g/mol Cl + 3(16.00 g/mol O)

= 99.45 g/mol

Now, we can calculate the percentage by mass of chlorate 1 in calcium chlorate 1:

% by mass of chlorate 1 in calcium chlorate 1 = (2 mol ClO3 x 99.45 g/mol) / (1 mol Ca(ClO3)2 x 238.06 g/mol) x 100%

= 83.3%

To calculate the percentage by mass of chlorate 1 in sodium chlorate, we only need to calculate the molar mass of NaClO3 and the molar mass of chlorate 1.

Molar mass of NaClO3 = 22.99 g/mol Na + 35.45 g/mol Cl + 3(16.00 g/mol O)

= 106.99 g/mol

Molar mass of chlorate 1 = 35.45 g/mol Cl + 3(16.00 g/mol O)

= 99.45 g/mol

Now, we can calculate the percentage by mass of chlorate 1 in sodium chlorate:

% by mass of chlorate 1 in sodium chlorate = (1 mol ClO3 x 99.45 g/mol) / (1 mol NaClO3 x 106.99 g/mol) x 100%

= 92.9%

Learn more about calcium chlorate here:

https://brainly.com/question/5923839

#SPJ1

Answer:

Potassium (K):   39.10 g/mol

Osmium (Os):   190.23 g/mol

Manganese (Mn):   54.94 g/mol

Explanation:

Just got it right on Edge 2021

The molar mass of the following elements are

Potassium (K): 39.10 g/mol

Osmium (Os): 190.23 g/mol

Manganese (Mn): 54.94 g/mol

The molar mass of a substance is grams of one mole of that substance.

It can be calculated by dividing the atomic weight of the element, and the number of atoms found in that element.

Manganese is a transition metal with the atomic number 25.

Potassium is an essential mineral that is an alkali metal and its atomic number is 19.

Osmium is also a transition metal whose atomic number is 76.

Thus, the molar mass of the elements are, Potassium (K): 39.10 g/mol

Osmium (Os): 190.23 g/mol

Manganese (Mn): 54.94 g/mol

Learn more about molar mass

https://brainly.com/question/12127540

Vapor unlikely to behave as an ideal gas near the temperature at which the vapor would liquify the intermolecular forces between the gas molecules become more significant as the temperature decreases.

An ideal gas can be envisioned as a hypothetical gas consisting of a collection of randomly-dispersed, non-interacting particles with negligible volume.

The notion of an ideal gas proves valuable as it adheres to the principles of the ideal gas law, which is a simplified equation of state.

Furthermore, the behavior of an ideal gas lends itself to analysis through the lens of statistical mechanics.

Learn about ideal gas law here https://brainly.com/question/27870704

#SPJ4

Answer:

Boyle's law: A) Pressure and volume.

Charles's law: B) Temperature and volume.

Gay-Lussac's law: C) Pressure and temperature.

Explanation:

Hello,

In this case, since Boyle's law study the relationship between pressure and volume at constant temperature as an inversely proportional one, we have:

Boyle's law: A) Pressure and volume.

Next, since the Charles' law study the relationship between the volume and the temperature at constant pressure as a directly proportional one, we have:

Charles's law: B) Temperature and volume.

Then, since the Gay-Lussac's law study the relationship between the pressure and the temperature at constant volume as a directly proportional one as well, we have:

Gay-Lussac's law: C) Pressure and temperature.

Best regards.

Answer:

D, B, E

Explanation:

The question is incomplete, the complete question is;

Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the position of the object on the slide.

An object at position has all kinetic energy. A B or C

An object at position has all potential energy. A B or C

An object at position has about half potential energy and half kinetic energy. A B or C

Answer:

An object at position C has all kinetic energy.

An object at position A has all potential energy.

An object at position B has about half potential energy and half kinetic energy.

Explanation:

Lets take a good look at the image.

At position A, the object is stationary and we know that the energy possessed by an an object by virtue of its position is known as potential energy. Hence at A, the energy possessed by the body is all potential.

At position B, the total mechanical energy of the object becomes potential energy + kinetic energy as the object is now in motion.

At position C, the object is still in motion and the energy is all kinetic.

Answer:

C

A

B

Explanation:

Option (a) is correct. The enthalpy of reaction is -9kJmole and activation energy decreases from 13 to 5 KJ mole because The use of catalyst in a reaction decreases the activation energy.

Activation energy is defined as the minimum amount of energy that must be provided for compounds to result in a chemical reaction. It is measured in joules per mole, kilojoules per mole or kilocalories per mole. The enthalpy of reaction is defined as the difference between total reactant and total product molar enthalpies which is calculated for substances in their standard states of a chemical reaction. The term Catalysis is defined as the process of increasing the rate of a chemical reaction by adding a substance which is known as a catalyst. Catalyzed reactions are defined as the reaction used to accelerate the rate by which a specific chemistry proceeds. For this reaction to occur, the catalytic substance interacts with a reactant and forms an intermediate compound.

To learn more about Activation energy

https://brainly.com/question/1380484

#SPJ4

For a particular reaction, the change in enthalpy is −9kJmole and the activation energy is 13kJmole. The enthalpy change (ΔH) and activation energy for the catalyzed reaction could be which of the following?

Select the correct answer below:

A)−9kJmole,5kJmole

B)−9kJmole,19kJmole

C)−14kJmole,5kJmole

D)−14kJmole,−13kJmole

0.150M CaCl₂ stock solution can be prepared using Mohr or serological pipette.

To make a solution using a Mohr or serological pipette, you'll need to follow these steps i.e to make a 0.025M CaCl₂ solution using 0.150M CaCl₂ stock solution and deionized water in a test tube, the following calculations can be used:

Step 1: Find the volume of 0.025M CaCl₂ solution that you want to make

Volume of 0.025M CaCl₂ solution = 10 mL

Step 2: Calculate the amount of CaCl₂ in the 0.025M solution Molarity = moles/volume Moles = molarity x volume

Moles of CaCl₂ in 10 mL of 0.025M solution = (0.025 mol/L) x 0.01 L = 0.00025 mol

Step 3: Calculate the volume of 0.150M CaCl₂ stock solution required to make 10 mL of 0.025M CaCl₂ solution

Moles = molarity x volume

Volume of 0.150M CaCl₂ stock solution = moles/molarity

Volume of 0.150M CaCl₂ stock solution required to make 10 mL of 0.025M CaCl₂ solution = 0.00025 mol/0.150 mol/L = 0.00167 L or 1.67 mL

Step 4: Add 1.67 mL of 0.150M CaCl₂ stock solution to a test tube and then add deionized water to make a total volume of 10 mL. Mix well.

Learn more about Mohr or serological pipette : https://brainly.com/question/30698369

#SPJ11

Taking into account the reaction stoichiometry, the minimum number of grams of ClO₂ that a chemistry must use to make 50 g of HClO₃ is 47.92 grams.

In first place, the balanced reaction is:

6 ClO₂ + 3 H₂O  → 5 HClO₃ + HCl

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 422.25 grams of HClO₃ are formed from 404.7 grams of ClO₂, 50 grams of HClO₃ are formed from how much mass of ClO₂?

mass of ClO₂= (50 grams of HClO₃× 404.7 grams of ClO₂)÷ 422.25 grams of HClO₃

mass of ClO₂= 47.92 grams

Finally, 47.92 grams of ClO₂ is required.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

#SPJ1

acetyl chloride > acetic anhydride > methyl acetate > acetamide is the correct order of decreasing reactivity in nucleophilic acyl substitution reactions.

Nucleophilic acyl substitution reaction is the term used to describe this type of substitution reaction where the acyl molecule and nucleophilic acyl interact. The nucleophile and carbonyl molecules interact with one another in this reaction through an addition reaction. Based on the leaving group's state, which is influenced by the compounds' acidity, acyl compounds are reactive. Acetyl chloride > acetic anhydride > methyl acetate > acetamide is the decreasing order of reactivity for the acyl compounds.

The acyl chloride that comes from acetic acid is called acetyl chloride. This organic chemical is a member of the acid halide class. The liquid is volatile, colourless, and corrosive. Commonly abbreviated as AcCl, it has the following formula. A fuming liquid with a strong odour and a colourless to pale yellow hue is acetyl chloride. Both medications and insecticides are produced using it.

learn more about acetyl chloride here

https://brainly.com/question/5139016

#SPJ4

Answer: Substances giving off heat and light, themselves, is always chemical. What we see in the sky are new colors and light. 1. Changing the size and shapes of pieces of wood would be a chemical change. 2. In a physical change, the makeup of matter is changed.

Explanation:

1.Nuclear charge decreases as the atomic number increases.Immersive Reader

Answer - True

2.In alkali metals, the atomic radius of potassium is greater than

Answer - Lithium

3.While moving across the periodic table from left to right there is an increase in atomic radius.

Answer - False

4.When moving from gold to lead, the atomic radius increases.

Answer - True

5.The picometer is the unit used to measure atomic radii.

Answer - True

6.Which of the following is larger in atomic size?

Answer - Boron

7.Chlorine has a larger atomic radius than fluorine.

Answer - True

8.Atomic size increases across a period.

Answer - False

9.The atomic radius of a nitrogen atom is 70 pm. What is the distance between the nuclei of two bonded nitrogen atoms in a N2 molecule

Answer - 140 pm

10.Arrange the following atoms in order of decreasing atomic radius:

Ga, As, Sn, Sb, Te

Answer - a. Sn, Sb, Te, Ga, As

Thanks for joining brainly community.

The complete nuclear fusion of each reaction: 2 1 H (hydrogen) + 2 1 H (hydrogen) → 4 2 He (helium) + 1 0 n (neutron) + D (deuterium) + E (energy)

238 92 U (uranium)

Nuclear fusion is a process by which atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. In nuclear fusion reactions, lighter elements combine to form heavier ones, resulting in the release of energy. One example of a nuclear fusion reaction is the fusion of two hydrogen atoms, which results in the formation of helium, a neutron, and the release of energy in the form of deuterium and energy (D and E). Another example is the fusion of uranium, which can result in the formation of thorium, helium, and the release of energy in the form of fissile and energy (F and G). These reactions play a crucial role in powering the stars, including our sun, and hold great promise as a clean and virtually limitless energy source for the future.

To know more about nuclear fusion reactions, visit:https://brainly.com/question/10104286

#SPJ4

Answer:

D: 3

E: 2

F: 234

G: 90

Explanation:

You have to get what is on the right to add up to the left in that row.

Also right on edge 2023

Answer:

3 and 4

Explanation:

After Rutherford did the alpha particle scattering experiment, he realised that most of the atom must be empty space, and the positive charge needed to be concentrated in the middle of the atom (in the nucleus).

This was because most of the alpha particles went straight through the gold sheet but some were deflected to the side or straight back.

This led to the nuclear model, where Rutherford concluded that most of the mass and all of the positive charge was concentrated in the middle of the atom in the nucleus, and the electrons existed in a sort of negatively charged cloud around the nucleus.

hope this makes sense!

There are a total of 4 hydrogen atoms on the reactant side of the balanced equation.

On the reactant side of the balanced equation, there are no hydrogen atoms present.

The balanced equation for the reaction between calcium carbide (CaC2) and water is:

CaC2 + 2H2O → C2H2 + Ca(OH)2

In this equation, the reactant side consists of CaC2 and 2H2O. CaC2 does not contain any hydrogen atoms, while 2H2O represents two molecules of water, each containing two hydrogen atoms. Therefore, the total number of hydrogen atoms on the reactant side is 2 (hydrogen atoms in one molecule of water) multiplied by 2 (two molecules of water), which equals 4 hydrogen atoms.

Learn more about hydrogen atoms here:-

https://brainly.com/question/30886690

#SPJ11

The functional groups that are involved in forming a peptide bond are the amine group (-NH2) and the carboxyl group (-COOH).

The formation of a peptide bond involves two functional groups: the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid. During the process, a condensation reaction occurs, resulting in the release of a water molecule. The carboxyl group of one amino acid donates a hydrogen atom (H) to the amino group of the adjacent amino acid, creating a peptide bond and forming a dipeptide. This process can continue through multiple amino acids, leading to the formation of longer polypeptide chains. Peptide bonds are crucial for the structural and functional integrity of proteins in living organisms. Proteins, which are made up of one or more polypeptide chains, are the most common type of biomolecules in living organisms.

To know more about dipeptide, visit:

https://brainly.com/question/32240062

#SPJ11