The diagram below shows the sequence of events and processes which resulted in the origin of life on Earth.
2 answers:
Answer: Option (D) is the correct answer.
Explanation:
When a non-living thing undergoes chemical processes then it leads to the transformation of atmosphere.
For example, both oxygen gas and hydrogen gas are non-living things but when they chemically combine with each other then it results in formation of water () molecules which helps in transformation of atmosphere.
Whereas cells, bacteria, and plants are all living things which cannot be obtained from a non-living thing.
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Answer:
1) Net ionic equation :
2) 0.765 M is the molarity of the carbonic acid solution.
Explanation:
1) In aqueous carbonic acid , carbonate ions and hydrogen ion is present.:
..[1]
In aqueous potassium hydroxide , potassium ions and hydroxide ion is present.:
..[2]
In aqueous potassium carbonate , potassium ions and carbonate ion is present.:
..[3]
From one:[1] ,[2] and [3]:
Cancelling common ions on both sides to get net ionic equation :
2)
To calculate the concentration of acid, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is
are the n-factor, molarity and volume of base which is KOH.
We are given:
Putting values in above equation, we get:
0.765 M is the molarity of the carbonic acid solution.