Chemistry For Changing Times (14th Edition)
Chemistry For Changing Times (14th Edition)
14th Edition
ISBN: 9780321972026
Author: John W. Hill, Terry W. McCreary
Publisher: PEARSON
Question
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Chapter 20, Problem 1RQ
Interpretation Introduction

Interpretation: To determine that where does most of the matter of a growing plant comes from.

Concept Introduction: Plants synthesize their food by the process of photosynthesis in which they utilize energy from sun, also water and minerals from soil via roots. They convert light energy into chemical energy which is stored in the form of carbohydrate molecules.

Photosynthetic reaction is represented as follows:

6CO2+6H2OLIGHTC6H12O6+6O2

Expert Solution & Answer
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Answer to Problem 1RQ

Solution: Plants grow rapidly by absorbing water, but they build up most part of their mass out of the air. In process of photosynthesis, plants use carbon dioxide (invisible gas) from air.

Explanation of Solution

Plant use energy (light energy) from sun which is converted into chemical energy and water is absorbed by osmosis from soil. Carbon dioxide in tons is released in the air during respiration by plants as well as animals and absorbed by the plants for photosynthesis. The product of photosynthesis is glucose which is burned as energy source for other chemical reactions to be carried out.

Conclusion

Plants grow rapidly by absorbing water, but they build up most part of their mass out of the air. In process of photosynthesis, plants use carbon dioxide (invisible gas) from air.

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