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2 years ago

A liquid is placed in an evacuated, sealed flask. When will this closed system reach dynamic equilibrium?

Chemistry

2 answers:

Valentin [98]2 years ago

7 0

When the rate of evaporation equals the rate of condensation

timurjin [86]2 years ago

4 0

The liquid will stop converting into vapor. This process is to balanced the amount of substance of both phases inside the flask.

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The reaction between nitrogen dioxide and carbon monoxide is NO2(g)+CO(g)→NO(g)+CO2(g)NO2(g)+CO(g)→NO(g)+CO2(g) The rate constan

galina1969 [7]

Answer:

$k_2=2.55\ {Ms}^{-1}$

Explanation:

Using the expression,

$\ln \dfrac{k_{1}}{k_{2}} =-\dfrac{E_{a}}{R} \left (\dfrac{1}{T_1}-\dfrac{1}{T_2} \right )$

Where,

$k_1\ is\ the\ rate\ constant\ at\ T_1$

$k_2\ is\ the\ rate\ constant\ at\ T_2$

$E_a$ is the activation energy

R is Gas constant having value = 8.314 J / K mol

$k_2=?$

$k_1=2.57\ {Ms}^{-1}$

$T_1=701\ K$

$T_2=525\ K$

$E_a=1.5\times 10^2\ kJ/mol$

So,

$\ln \:\frac{2.57}{k_2}\:=-\frac{1.5\times \:10^2}{8.314}\times \left(\frac{1}{701}-\frac{1}{525}\right)\:\:$

$k_2=\frac{2.57}{e^{\frac{352}{40796.798}}}=2.55\ {Ms}^{-1}$

7 0

2 years ago

Which statement best explains the process occurring in step 4 of the life<br>cycle?

Marat540 [252]

Answer:

Which statement best compares a eukaryote and a prokaryote?

A. Eukaryotes have a cell wall, while prokaryotes have a cell membrane.

*B. Eukaryotes have membrane-bound organelles, while prokaryotes have few specialized

structures.

C. Eukaryotes use active transport to move substances across the cell membrane, while

prokaryotes use facilitated diffusion.

D. Eukaryotes use flagella to move themselves through substances, while prokaryotes are not

able to move.

Explanation: its B

5 0

3 years ago

What is The pH and pOH of a 1.00x10-3M solution of CH3COOH (Ka=1.75x10-5) ?

zaharov [31]

Answer:

Explanation:

Since $CH _ 3COOH$ is a weak acid to find the pH of $CH _ 3COOH$ we use the formula

$pH = - \frac{1}{2} log(Ka) - \frac{1}{2} log(c)$

where

Ka is the acid dissociation constant

c is the concentration

From the question

Ka of $CH _ 3COOH$ = 1.75 × 10^-5

c = 1.00 × 10-³M

Substitute the values into the above formula and solve for the pH

That's

$pH = \frac{1}{2} ( - log(1.75 \times {10 }^{ - 5} - log(1.00 \times {10}^{ - 3} ) ) \\ = \frac{1}{2} (4.757 + 3) \\ = \frac{1}{2} \times 7.757) \\ = 3.8785 \: \: \: \: \: \: \: \:$

We have the answer as

To find the pOH we use the formula

pH + pOH = 14

pOH = 14 - pH

pOH = 14 - 3.9

We have the answer as

Hope this helps you

4 0

2 years ago

How many electrons will a fluorine (f) atom gain or lose in forming an ion?

777dan777 [17]

It will gain one electrons to form the fluorine ion

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3 years ago

Help me for brainlest pleaes

Tresset [83]

First option.

The male tails are more attractive because of their long feathers , meanwhile the female tails are shorter than expected!

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2 years ago