1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sedbober [7]
3 years ago
15

At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 56 torr

to decay to 14.5 torr?
Chemistry
1 answer:
Gwar [14]3 years ago
5 0

This is an incomplete question, here is a complete question.

Consider the second-order decomposition of nitroysl chloride:

2NOCl(g)\rightarrow 2NO(g)+Cl_2(g)

At 450 K the rate constant is 15.4 atm⁻¹s⁻¹. How much time (in s) is needed for NOCl originally at a partial pressure of 53 torr to decay to 10.6 torr?

Answer : The time needed for NOCl is, 2.52 seconds.

Explanation :  Given,

Rate constant = 15.4atm^{-1}s^{-1}

Initial partial pressure of NOCl = 56 torr = 0.0737 atm

final partial pressure of NOCl = 14.5 torr = 0.0191 atm

The expression used for second order kinetics is:

kt=\frac{1}{[A_t]}-\frac{1}{[A_o]}

where,

k = rate constant

t = time

[A_t] = concentration at time 't'

[A_o] = initial concentration

As we know that,

PV=nRT\text{ or }PV=CRT

Thus, the expression of second order kinetics will be:

kt=RT\times \frac{1}{P_{(A_t)}}-\frac{1}{P_{(A_o)}}

\frac{k}{RT}t=\frac{1}{P_{(A_t)}}-\frac{1}{P_{(A_o)}}

As, k'=\frac{k}{RT}

So, k't=\frac{1}{P_{(A_t)}}-\frac{1}{P_{(A_o)}}         ............(1)

Now put all the given values in the above expression 1, we get:

(15.4atm^{-1}s^{-1})\times t=\frac{1}{0.0191atm}-\frac{1}{0.0737atm}

t=2.52s

Therefore, the time needed for NOCl is, 2.52 seconds.

You might be interested in
An ion of which element is larger than its<br> atom?<br> Al<br><br> I<br><br> Са<br><br> Sr
SIZIF [17.4K]

Option 2

Hope this helps :)

5 0
3 years ago
Read 2 more answers
U
Ymorist [56]

Answer:

north Carolina has been the first to have a

Explanation:

nhi has a very strong sense that the company has been working with the new company for a few weeks to girl the first time you can buy the first of the new series and it is the youngest ever seen on stilts and a few more days in plants with the high quality and a lot more of the time it is on their own than they are you and the new ones that you can do with example and a few of them in plants and other than that of a variety that help you are c and <em><u>a</u></em><em><u> </u></em>lot more likely than the other <em><u>ones</u></em><em><u> </u></em>yyyjjbest and boy friendly way for girls in

5 0
2 years ago
Which of the following ways can the volume of a gas be changed, without changing its mass? Select all that apply.
pochemuha

Answer:

It can be spread into a smaller container

It can ve spread out into a larger container

It can be dissolved into a liquid

8 0
2 years ago
Read 2 more answers
Shawn wants to buy a pair of gloves online. She needs to
Ksivusya [100]
The answer would be millimeters
so answer choice d
5 0
3 years ago
A compound is made up of 28 g N, 24 g C, 48 g O, and 8 g H .What is the empirical formula?
vovikov84 [41]

Answer:

\rm C_2H_8N_2O_3.

Explanation:

<h3>Step One: calculate the coefficients. </h3>

Look up the relative atomic mass of these four elements on a modern periodic table:

  • \rm C: approximately 12.
  • \rm H: approximately 1.
  • \rm N: approximately 14.
  • \rm O: approximately 16.

The relative atomic mass of an element is numerically equal to the mass (in grams, \rm g,) of one mole of atoms of this element.

For example, the relative atomic mass of \rm C is approximately 12. Therefore, each mole of \rm C\! atoms would have a mass of 12\; \rm g.

This sample contains 24\; \rm g of carbon. That would correspond to approximately \displaystyle \left(\frac{24}{12}\right)\; \rm mol = 2\; \rm mol of \rm C atoms.

Similarly, for the other three elements:

\displaystyle n(\mathrm{H}) \approx \frac{8\; \rm g}{1\; \rm g \cdot mol^{-1}} = 8\; \rm mol.

\displaystyle n(\mathrm{N}) \approx \frac{28\; \rm g}{14\; \rm g \cdot mol^{-1}} = 2\; \rm mol.

\displaystyle n(\mathrm{O}) \approx \frac{48\; \rm g}{16\; \rm g \cdot mol^{-1}} = 3\; \rm mol.

Hence, the ratio between these elements in this compound would be:

n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3.

In the empirical formula of a compound, the coefficients should represent the smallest possible integer ratio between the number of atoms of these elements.

n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3 is indeed the smallest possible integer ratio between the number of atoms of these elements.

<h3>Step Two: arrange the elements in an appropriate order</h3>

Apply the Hill System to arrange these four elements in the empirical formula. In the Hill System:

If carbon, \rm C, is present in this compound, then:

  • \rm C (carbon) and then \rm H (hydrogen) will be the first two elements listed in the formula (ignore the hydrogen if it is not in the compound.)
  • The other elements in this compound will be listed in alphabetical order.

If there is no carbon \rm C in this compound, then list all the elements in this compound in alphabetical order.

Both \rm C (carbon) and \rm H (hydrogen) are found in this compound. Therefore, the first element in the list would be \rm C\!. The second would be \rm H\!, followed by \rm N\! and then \rm O\!.

Hence, the empirical formula of this compound would be \rm C_2H_8N_2O_3.

6 0
3 years ago
Other questions:
  • A prototype is usually different from the final product
    12·1 answer
  • How many atoms are in 1.14 mol of sulfur trioxide
    8·1 answer
  • How is the atomic theory that is accepted today different from daltons atomic theory?
    9·1 answer
  • According to the law of conservation of mass the mass of reactants will be _____to the mass of products
    5·1 answer
  • What is the material called that covers landmasses. the material is made out of once-living animals and tiny bits of rocks?
    8·1 answer
  • What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent?
    6·2 answers
  • Name the following amide:<br> O<br> CH3<br> CH2CH2CH2CN<br> CH3
    8·1 answer
  • How many electrons are in the outermost energy level of a neutral<br> strontium atom?*
    12·1 answer
  • Give an example of an element which was named as honour to a scientist!!
    7·2 answers
  • What would you have to do to the substance in
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!