The initial concentration of NOCl in the second-order reaction 2NOClâ2NO+Cl2 is 0.878M. After 763,200 seconds, the concentration of NOCl is 0.83M. What is the rate constant k for the reaction? Report your answer in scientific notation rounded to two significant figures. Use the multiplication symbol when reporting your answer rather than the letter x. Provide your answer below: $$ 1/M s

Answers

Answer 1

Answer:

[tex]k=8.63x10^{-8}\frac{1}{M*s}[/tex]

Explanation:

Hello!

In this case, since the differential rate law of a second-order reaction is:

[tex]\frac{dC_A}{dt}=-kC_A^2[/tex]

Whereas A stands for NOCl and the corresponding integrated rate law is:

[tex]\frac{1}{C_A} =kt+\frac{1}{C_A_0}[/tex]

Thus, since we know the concentrations and the elapsed time, we compute the rate constant as shown below:

[tex]k=( \frac{1}{C_A}-\frac{1}{C_A_0} )/t\\\\k=( \frac{1}{0.83M}-\frac{1}{0.878M} )/763,200s\\\\k=8.63x10^{-8}\frac{1}{M*s}[/tex]

Best regards!


Related Questions

What is the definition of an Isomer?

Answers

Answer:

Each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.

Explanation:

each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.

Which of the following molecules has a covalent bond?
A) H-F
B) H-Cl
C) H-Br

Answers

what is the options but i would say A but not sure
All of them are covalent bonds, all the elements are non metals and covalent bonds are formed between 2 non metals.

In ethane, C2H6, ethene (ethylene), C2H4, and ethine (acetylene), C2H2, there are direct carbon-carbon bonds. Which one is the shortest?

a. The carbon-carbon bond in ethane's the longest!)
b. The carbon-carbon bond in ethene is the longest
c. The carbon-carbon bond in ethyne is the longest.
d. All of the carbon-carbon bonds have the same length.

Answers

Answer:

a. The carbon-carbon bond in ethane's the longest!)

Explanation:

Ethane is a chemical compound that is organic in nature. Its chemical formula is [tex]$C_2H_6$[/tex]. It has two carbon atoms and six of hydrogen atoms that is connected to the carbon atoms.

Ethane is odorless and colorless at the standard temperature and standard pressure.

The carbon to carbon atoms in ethane is connected by a single bond.

The length of single carbon-carbon bond is greater than carbon-carbon double bond and triple bond.

Thus, carbon-carbon bond length in ethane is the longest.

How much 1.50M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

Answers

Answer: 234.8 M

Explanation:

Which descriptions are true regarding different muscle types? Select four options.
Cardiac and skeletal muscles are striated.
Skeletal and smooth muscles are nonstriated.
Smooth and cardiac muscles are voluntary.
Heart and digestive muscles are involuntary muscles.
Smooth and skeletal muscles are involved in movement.
Cardiac muscles work to pump blood.

Answers

Answer:

1, 4, 5, 6

Explanation:

Answer:

1,4,5,6

Explanation:

In the US, nutritional energy is reported in Calories (Cal). One nutritional Calorie is equal to one kilocalorie (kcal). If a food package reports 250.0 Calories (Cal) per serving, how many calories (cal) are in each serving?

Answers

Answer:

2.500 × 10⁵ cal

Explanation:

1kcal= 1000 cal

From the analysis, the number of calories in each serving of a food with 250 Calories would be 250,000 calories.

According to the illustration:

               1 Calories = 1 kilocalories

The food package reports 250 Calories

Hence, 250 Calories = 1 x 250 kilocalories

                                      = 250 kilocalories

According to metrics, 1 kilocalories = 1,000 calories

Thus, 250 kilocalories = 250 x 1000 calories

                                      = 250,000 calories

More on unit conversion can be found here: https://brainly.com/question/19420601

is the center of an atom is called the nucleus?​

Answers

Answer:

The center of the atom contains the nucleus so yes

Explanation:


Anyone know this ???

Answers

Hey There!_____________________________________Answer:

[tex]\huge\boxed{OptionB}[/tex]

_____________________________________VESSEL A:

The superior vena cava (SVC) is the superior of the two venae cavae, It is located above inferior vena cava and it returns the deoxygenated blood from the systemic circulation to the right atrium of the heart.

----------------------------------------------------------------------VESSEL C:

The aorta is the main artery that carries blood away from your heart to the rest of your body.

----------------------------------------------------------------------ATRIUM D:

The Left Atrium is one of the two atriums, it receives the oxygenated blood from the lungs via Pulmonary vein.

----------------------------------------------------------------------VENTRICLE E:

The Left Ventricle is one of the two ventricles, it receives the oxygenated blood by the Left atrium through the mitral valves. From the ventricle oxygenated blood is provided to the whole body.

----------------------------------------------------------------------VESSEL B:

Pulmonary Artery is one of the two pulmonary vessels which connect the blood heart and lung. Pulmonary Artery takes the deoxygenated blood from the Right ventricle to the Lungs from the oxygenation.

_____________________________________Best Regards,'Borz'

What determines the speed at which a particle of matter moves

Answers

Answer:

The force exerted on it.

Explanation:

As the law of motion states, an object at rest will remain at rest an object in motion will remain in motion unless acted upon by another force.

Write the balanced chemical equation for the following reaction. Phases are optional. Solid iron(I) oxide reacts with hydrogen gas to form solid iron and liquid water. 2Fe+3H,Ol Fe,O,+ 3H2 â 2Fe+ 3H2O(I)

Answers

Answer:

[tex]Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(l)[/tex]

Explanation:

Hello!

In this case, when writing chemical reactions from the given names we must make sure we know the proper formula for each reacted and produced species; thus, since solid iron (III) oxide is [tex]Fe_2O_3[/tex], hydrogen gas is [tex]H_2[/tex], solid iron is Fe and liquid water is just [tex]H_2O[/tex], we can write:

[tex]Fe_2O_3(s)+H_2(g)\rightarrow Fe(s)+H_2O(l)[/tex]

However, since different amount of atoms of iron, hydrogen and oxygen are present at each side of the equation, we balance it by adding the following coefficients to each molecule:

[tex]Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(l)[/tex]

And now it is balanced with two iron atoms, three oxygen atoms and six hydrogen atoms at both reactants and products.

Best regards!

Please help!!! I will give five stars and points for correct answer with an explanation.
What do the blue and red lines indicate?
A cold front is moving to the north and west before a warm front moves through.
A cold front is moving to the south and east before a warm front moves through.
A warm front is moving to the north and east before a cold front moves through.
A warm front is moving to the south and west before a cold front moves through.
Picture is attached.

Answers

Answer:

A cold front is moving to the north and west before a warm front moves through.

Explanation:

The blue line indicated a cold front and the red line indicates a warm front. Both lines are moving up (north) and to the left (west) on the globe. Key words are north and west, which indicates the direction of which the fronts are moving even if it is unclear of which front is before the other.

7.46 - A 0.0500-mol sample of a nutrient substance is burned in a bomb calorimeter containing 2.00 x 10g H20. If the formula weight of this nutrient substance is 114 g/mol, what is the fuel value (in nutritional Cal) if the temperature of the water increased 5.70C?​

Answers

Answer:

[tex]200\frac{kcal}{g}[/tex]

Explanation:

Hello!

In this case, for this calorimetry problem, since the combustion 0.0500 mol of the nutrient increase the temperature of water by 5.70 °C, we can notice that the heat lost by the nutrient is gained by water in order to write:

[tex]Q_{nutrient}=-Q_{water}[/tex]

Which can be also written as:

[tex]Q_{nutrient}=-m_{water}C_{water}\Delta T_{water}\\\\Q_{nutrient}=-200 g*4.184\frac{J}{g\°C}*5.70\°C\\\\Q_{nutrient}=4769.8 J[/tex]

Thus, in terms of the grams of the nutrient:

[tex]m_{nutrient}=0.0500mol*\frac{114g}{1mol}=5.70g[/tex]

The fuel value in nutritional Cal (kcal/g) turns out:

[tex]Fuel \ Value=\frac{-4.7698kJ}{5.70g}*\frac{1kcal}{4.184kJ}=200\frac{kcal}{g}[/tex]

Best regards!

Decide which of the following statements are true and which are false, concerning the kinetic molecular theory.
1. The particles are in constant motion. The collisions of the particles with the walls of the container are the cause of the pressure exerted by the gas.
A. True
B. False
2. The particles are assumed to exert no forces on each other; they are assumed neither to attract nor to repel each other.
A. TrueB. False
3. The particles are so small compared with the distances between them that the volume of the individual particles can be assumed to be about 1 mL.
A. TrueB. False
4. The molecules in a real gas have finite volumes and do exert forces on each other, thus real gases do not conform to some of the assumptions of an ideal gas as stated by the kinetic molecular theory.
A. TrueB. False
5. The average kinetic energy of a collection of gas particles is assumed to be inversely proportional to the Kelvin temperature of the gas.
A. TrueB. False

Answers

Answer:

1. A. True

2. A. True

3. B. False

4. A. True

5. B. False

Explanation:

1. The particles are in constant motion. The collisions of the particles with the walls of the container are the cause of the pressure exerted by the gas. A. True. The pressure of an ideal gas is higher than the one that would exert a real gas.

2. The particles are assumed to exert no forces on each other; they are assumed neither to attract nor to repel each other. A. True. The intermolecular forces are negligible.

3. The particles are so small compared with the distances between them that the volume of the individual particles can be assumed to be about 1 mL. B. False. The volume of the gas particles is negligible.

4. The molecules in a real gas have finite volumes and do exert forces on each other, thus real gases do not conform to some of the assumptions of an ideal gas as stated by the kinetic molecular theory. A. True. We cannot apply ideal gas laws to real gases.

5. The average kinetic energy of a collection of gas particles is assumed to be inversely proportional to the Kelvin temperature of the gas. B. False. The average kinetic energy of a collection of gas particles is assumed to be directly proportional to the Kelvin temperature of the gas.

The given statement, "if the particles are in constant motion and there are collisions of the particles with the walls of the container, then they are the cause of the pressure exerted by the gas." is:

True

The given statement "The particles are assumed to exert no forces on each other; they are assumed neither to attract nor to repel each other" is:

True

The given statement, "The particles are so small compared with the distances between them that the volume of the individual particles can be assumed to be about 1 mL" is:

False  

The given statement ,"The molecules in a real gas have finite volumes and do exert forces on each other, thus real gases do not conform to some of the assumptions of an ideal gas as stated by the kinetic molecular theory" is:

True

The given statement, "The average kinetic energy of a collection of gas particles is assumed to be inversely proportional to the Kelvin temperature of the gas" is:

False

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Is adding food coloring to frosting a chemical reaction?

Answers

Answer:

no

Explanation:

Answer:

Yes

Explanation:

Adding food coloring to batter or to your icing involves a chemical reaction of the two products bonding together. This bonding process starts when you add the color and mix it in, but it doesn't end straight away as the color needs some time to fully integrate and settle.

What kind of mixture is sometimes difficult to distinguish form a compound? Why?

Answers

Answer:

In a heterogeneous mixture, the parts of the mixture are noticeably different from one another. In a homogeneous mixture, the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.

The parts of the mixture are distinctly different from one another in a heterogeneous mixture. The substances are so uniformly distributed in a homogeneous mixture that it is difficult to differentiate one substance from another in the mixture.

22. The metal roof of a building has turned a light green colour. The metal roof is most likely

Answers

The metal roof is most likely made of copper.

Copper turns green over an extended period of time when exposed to water. For example, The Statue of Liberty is made of copper and was once a bronze color. Now, it is green, similar to the roof

How many oxygen atoms will there be in the balanced equation of Al+O2-Al2O3

Answers

Answer: 10

Explanation:

4Al + 2O2 --> 2Al2O3

This is the balanced equation so there are 2*2 +2*3 = 4+6 =10

If the temperature of the water inside of the
pressure cooker is greater than 104'C, and the
water is still a liquid, then the pressure inside of the
pressure cooker must be
less than 1 atm
equal to 1 atm
c.
greater than 1 atm

Answers

Answer:

(C). Greater than 1atm

Explanation:

We are aware that water boils at 100 degree Celsius. Water can change its phase and become vapor at  100degree Celsius and at normal pressure which is 1atm.

In the given scenario we have enough temperature to convert water into vapor phase but we don't want it rather we want it to remain in liquid state. This can be achieved by increasing the pressure which was earlier required for vapor phase conversion. So the pressure should be greater than 1atm.

When we increase the temperature the molecules will get enough energy to escape into vapor phase, but when we will increase the pressure, it will provide hindrance to those molecules and will maintain them into Liquid state.

What is the reason for the trend in lonization Energy? Select all that apply.
A. larger atomic mass number
B. number of energy levels around the nucleus C. number of valence electrons.
D. number of protons in the nucleus
E. number of neutrons in the nucleus​

Answers

Answer:

Explanation:

A, D,E and B i think is the correct answers  

Ultraviolet light A (UVA) can penetrate deeper layers of skin than UVB. If UVA has a wavelength of 400 nm, how much energy would be in this wave? 2 x 10-17)​

Answers

Answer:

E = 5×10⁻¹⁹ J

Explanation:

Given data:

Wavelength = 400 nm (400×10⁻⁹ m)

Energy of wave = ?

Solution:

Formula:

E = h c/λ

c = 3×10⁸ m/s

h = 6.63×10⁻³⁴ Js

Now we will put the values in formula.

E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s /400×10⁻⁹ m

E = 19.89×10⁻²⁶ J.m / 400×10⁻⁹ m

E = 0.05×10⁻¹⁷ J

E = 5×10⁻¹⁹ J

Arrange in order of decreasing atomic radii: Kr, K, Ge, Ca

Answers

Answer:

K > Ca > Ge > Kr

Explanation:

The elements given are all in the 4th period on the periodic table.

       Kr, k, Ge, Ca;

Arranging their order from left to right;

         K, Ca, Ge, Kr

Atomic radius is taken as half the of the inter-nuclear distance (d) between two covalently bonded atoms of non-metallic elements or half the distance between two nuclei in the solid state of metals.

Across the periodic table atomic radii decreases progressively from left to right. This is due to progressive increase in the nuclear charge (number of protons in the nucleus) without an attendant increase in the number of electronic shells.

From the left to right; decreasing radii;

         K > Ca > Ge > Kr

In the nucleus of an atom, there are 17 protons and 18 neutrons. What is the atomic number? What is the atomic mass? How many electrons are there?

Answers

Answer:

atomic number =17

mass number = 17+18= 35

Which is a chemical property of soda ash?

Answers

Explanation:

A chemical property of soda ash is, it is a alkaline compound

**I WILL PAY MONEY** i have 10 pages in a chemistry packet mostly multiple choice, whoever could do them for me i can pay like 20$. it would mean a lot. i attached pictures of what its like

Answers

Answer:

Ill do it for free hmu on Insta (allmyhomiesbeautiful) or Snap (nzmbndzmb)

Determine the number of Au atoms found in 5.18 grams of gold.

A.1.02x1022 atoms
B. 3.84 x 1022 atoms
C.2.13 x 1022 atoms
D.4.58x1022 atoms
1.58 x 1022. atoms
Please let me know

Answers

Answer:

1.58× 10²² atoms of Au

Explanation:

Given data:

Mass of gold = 5.18 g

Number of atoms of gold = ?

Solution:

First of all we will calculate the number of moles of gold.

Number of moles = mass/molar mass

Number of moles = 5.18 g/196.96 g/mol

Number of moles = 0.0263 mol

Number of atoms:

Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms of Au

0.0263 mol × 6.022 × 10²³ atoms of Au / 1mol

0.158× 10²³ atoms of Au

1.58× 10²² atoms of Au

In case of accidental contact with chemicals, how long should the eyes be flushed at the eyewash station

Answers

Answer:

See the answer below

Explanation:

The duration of flushing the eyes at the eyewash station in case of accidental contact with chemicals depends of the nature of the chemical.

If the chemical is known to be a non-irritant or mild-irritant one, a 5-minute washing time is recommended as the first aid. before seeking the help of a physician,

For moderate to severe irritant chemicals, an immediate 15-20 minutes washing period is recommended before seeking further medical help.

For corrosive and strong alkalis chemicals, 30 and 60 minutes washing are recommended respectively before seeking the attention of a physician.

However, if the nature of the chemical is unknown, a minimum of 20-minutes washing is generally recommended as first aid before seeking immediate medical help.

The duration of flushing the eyes at the eyewash station in case of accidental contact with chemicals depends on the nature of the chemical.

If the chemical is known to be a non-irritant or mild-irritant one, a 5-minute washing time is recommended as the first aid. before seeking the help of a physician,For moderate to severe irritant chemicals, an immediate 15-20 minutes of washing is recommended before seeking further medical help.For corrosive chemicals, 30 and 60 minutes of washing are recommended respectively before seeking the attention of a physician.If the nature of the chemical is not known, a minimum of 20-minutes of washing is generally recommended as first aid before seeking immediate medical help.

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Which unit of measurement would best be used to measure the volume of a points a DROP of water? .​

Answers

Answer:

milliliter

Explanation:

smallest form of measuring volume from all the available choices

Calculate pCl for the titration of 100.0mL of 0.1000 MCI with 0.1000 M
AgNO3 for the addition of 0.00 and 20.00 mL AgNO3.

Answers

the titration is the most important part in determining whether

How many different principal quantum numbers can be found in the ground-state electron configuration of nickel?A) 2.B) 3.C) 4.D) 5.E) 6.

Answers

Answer:

C) 4.

Explanation:

Hello!

In this case, since the electron configuration of nickel at its ground-state, considering 28 as its atomic number and the number of electrons it has in one atom, is:

[tex]Ni^{28}:1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^8[/tex]

We can see it has four energy levels, 1, 2, 3 and 4, which are related to the following principal quantum number, that describes the energy of an electron in the atom and its most probable distance with respect to the nucleus.

Therefore, nickel has C) 4 different principal quantum numbers.

Best regards!

I NEED HELP ASAP PLEASE I BEG

Answers

with what?..................

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