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svlad2 [7]
3 years ago
8

What are examples of covalent substances?

Chemistry
1 answer:
DENIUS [597]3 years ago
7 0

Answer:

Explanation:

oxygen.

chlorine.

phosphorus chloride.

ethanol.

ozone.

hydrogen.

water.

hydrogen chloride.

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What is the value for the reaction: N2(g) + 2 O2(g) --> N2O4(g) in terms of K values from the reactions:
Valentin [98]

Answer : The correct expression will be:

K=(K_1)^2\times K_2

Explanation :

The chemical reactions are :

(1) \frac{1}{2}N_2(g)+\frac{1}{2}O_2(g)\rightleftharpoons NO(g) K_1

(2) 2NO(g)+O_2(g)\rightleftharpoons N_2O_4(g) K_2

The final chemical reaction is :

N_2(g)+2O_2(g)\rightleftharpoons N_2O_4 K=?

Now we have to calculate the value of K for the final reaction.

Now equation 1 is multiply by 2 and then add both the reaction we get the value of 'K'.

If the equation is multiplied by a factor of '2', the equilibrium constant will be the square of the equilibrium constant of initial reaction.

If the two equations are added then equilibrium constant will be multiplied.

Thus, the value of 'K' will be:

K=(K_1)^2\times K_2

6 0
3 years ago
A bottle of wine contains 0.21 moles of ethanol,C2H5OH. The volume of the solution is 0.1 L. Calculate the molarity.
Yuliya22 [10]

Answer:

2.1mol/L

Explanation:

Number of moles = 0.21 moles

Volume = 0.1L

Molarity of a substance is the number of moles of solute dissolved in a volume of solvent (L)

Molarity = number of moles / volume of solvent

Molarity = 0.21 / 0.1

Molarity = 2.1mol/L

8 0
3 years ago
What term best defines the process that occurs when nuclei combine to produce a nucleus with more mass?
bekas [8.4K]
I just answered your other question and wrote all the definitions of the terms. I would say this is probably refering to Fusion because you are fusing together more nuclei into one nucleus. Fusion= bringing separate things into one entity.
4 0
3 years ago
Read 2 more answers
The average human lives 74 years. how many seconds is this? write your answer in scientific notation
Leviafan [203]

Number of second in human lives in scientific notation is 3.9 × 10⁷ second

<u>Given that;</u>

Average human lives = 74 years

<u>Find:</u>

Number of second in human lives in scientific notation

<u>Computation:</u>

Number of second in human lives in scientific notation = 74 × 365 × 24 × 60

Number of second in human lives in scientific notation = 38,894,400

Number of second in human lives in scientific notation = 3.9 × 10⁷ second

Learn more:

brainly.com/question/3712546?referrer=searchResults

8 0
3 years ago
PLEASE HELP ASAP!!! science
Ksju [112]

Answer:

It's the oesophagus.

Explanation:

The worm digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard. The oesophagus is not mentioned. Thus, it's not part of the worm digestive system.

8 0
3 years ago
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