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2 years ago

Choose one branch of chemistry and give the impostance of it

Chemistry

1 answer:

igor_vitrenko [27]2 years ago

5 0

Answer:

it is important is that it gives you a framework to work together. It provides you with a platform to take collective efforts towards improving social conditions. Most importantly, a society serves as a strong support system in life.

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The decomposition of dinitrogen pentoxide, N2O5, to NO2 and O2 is a first-order reaction. At 60°C, the rate constant is 2.8 × 10

Ugo [173]

Answer:

The correct option is a.

Explanation:

$2N_2O_5\rightarrow 4NO_2 + O_2$

125 kPa

125kpa - 2x 4x x

Total pressure after reaction = 176 kPa

125 kPa - 2x + 4x + x = 176 kPa

x = 17

125 kpa - 2x = 125 kPa - 2(17) = 91 kPa

Initial pressure of the dinitrogen pentoxide ,(at t=0) = $P_o= 125 kPa$

Final pressure of the dinitrogen pentoxide, (at t = t) = P = 91 kPa

The rate constant is = $k = 2.8\times 10^{-3} min^{-1}$

$t=\frac{2.303}{k}\log\frac{P_o}{P}$

$t=\frac{2.303}{2.8\times 10^{-3} min^{-1}}\log\frac{125 kPa}{91 kPa}$

$t=113.3969 minutes\approx 113 minutes$

It will take 113 minutes for the total pressure to reach 176 kPa.

8 0

2 years ago

How do you know if the reaction is exothermic

MArishka [77]

Hey there!
Exothermic reactions release heat, causing its temperature to fall. If the reaction is lessening the temperature of the object while releasing all the heat, then you know that the reaction is indeed exothermic. Hope this helps!

5 0

2 years ago

why would you expect to see similar rocks and rock structures on two land masses that were connected at one time?

tangare [24]

If they were connected at one time than you would expect to find similar rock structures because they eroded, weathered, and we’re formed most likely at the same time out of the same material. So basically since they were near each other they were under the same or similar conditions.

3 0

2 years ago

Write out the recipe and list all the ingredients (including the measures) of your favorite dish.

arsen [322]

The recipe for an omelet are:

<u>Ingredients</u>

1 Egg
Salt and pepper ( 1 tablespoon )
Butter ( 1 tablespoon )

<u>Recipe:</u>

Turn on the heat and place a pan on it.
Add butter to the pan.
Crack the egg and whisk it properly.
Add the whisked omelet onto the pan and stir.
Add salt and pepper.

<h3>How to illustrate the information?</h3>

When we turn on the heat and place the pan, a heat transfer takes place and heat transfers from one body to another.

When we add butter to the pan, then the temperature of the pan was more than that of the butter.

Since the melting point of butter was less than the temperature of the pan, the the melting of butter takes place.

When we add the egg, the evaporation of the liquid present in the egg yolk and the egg white takes place.

These are the chemical reactions depicted.

Learn more about recipe on:

brainly.com/question/21913357

#SPJ1

4 0

1 year ago

During active transport, substances move from regions of blank concentration to regions of blank concentration

Annette [7]

<span>Active transport runs counter to facilitated diffusion. In active transport, molecules move against the concentration gradients, running from areas of lower concentration to areas of higher concentration. This is where energy is used.</span>

4 0

3 years ago