Question

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5. Why should we balance a chemical equation (2m)
6. Draw a ray diagram to show the angle of deviation when a ray
through a glass prism (2m)
7. Draw the structure of Human eye and label its parts (2m)
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( or )
What are the important characteristics of Chemical reactions ?​

Answer 1

Answer:

An equation should be balanced in order to comply with the "laws of conservation of matter" which states that energy can neither be created nor be destroyed in course of a chemical reaction. An unbalanced equation would imply that atoms have been created or destroyed.

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