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bassicallytristen
06.02.2022 •
Chemistry
Classify the following reaction:
H₂CO₃(aq) → H₂O(l) + CO₂(g)
A) synthesis (or combination)
B) decomposition
C) combustion
D) single displacement (replacement)
E) double displacement (replacement)
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Ответ:
H2CO3( AQ) gives H2O + CO2
This reaction is decomposition reaction
Decomposition reaction are those reactions in which reactant is breakdown in a form that it gives two or more than two products
All decomposition reaction are endothermic but all endothermic reactions are not decomposition reaction .
Hence, Option B is the correct answer.
Ответ:
In distillation, the more volatile component vaporizes and allowed to condense again to gather the volatile-rich solution. The less volatile stays on the bottoms of the tower. In magnetic separation, you just collect the metals from non-metals. In screening, you separate the smaller pieces from the larger pieces with the use of screens. In evaporation, water is separated from the solute by vaporizing it. You will be left with a more concentrated solution. However, the water is not lost because it could be condensed again back to liquid water.
However, to provide an answer, I think the closest would be evaporation. This applies to natural evaporation like a cup of coffee left in open air. You can't recover water anymore because it evaporized to the atmosphere. But still, technically, it comes back as precipitated rain.