The right response is combustion reaction and synthesis reaction.
A hydrocarbon reacting chemically with oxygen to produce carbon dioxide and water is known as a combustion reaction.
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The term "synthesis reaction" refers to the chemical process wherein elements combine to generate a single product.
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Because hydrogen and chlorine combine to form the molecule of hydrochloric acid in their elemental states, this process is regarded as a synthesis reaction.
For A : 
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Because hydrogen gas and chlorine gas are mixed in their elemental states to create the hydrochloric acid molecule, this process is regarded as a synthesis reaction.
For B: 
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Because methane and oxygen combine to create carbon dioxide and water molecules, this reaction is regarded as a combustion reaction.
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Basically it means carbon dioxide is removed from the atmosphere and is trapped in e.g. calcium carbonate (like shells), rocks, oceans etc.
This is an example of "Skyscrapers".
Explanation:
- Skyscraper is a high rise, tall multi storied building of that consist of about 40 floors inside it that is mainly built for the corporate offices, commercial spaces and residential flats.
- Buildings that are higher than 150m height are known skyscrapers. They have steel or iron framework to its inner side of the building that supports its floor and walls.
- Skyscrapers are made possible by the process of Bessemer process of mass production of steel beam.
The square root of 3.4 squared plus .81 squared is your answer
Answer:
A. Hot water increases the collision rate of the molecules, causing the
reaction to occur faster.
Explanation:
Hot water molecules move faster than cold water molecules.
