Question

List for observations which help us to determine whether a chemical reaction has take place

Answer 1

u will notice that there is a cahnge in molecular mass,chemical composition,colour of the substance ,state of the substance

Answer 2

Answer:

HEY MATE

HERE IS YOUR ANSWER

Explanation:

The observations help us to determine whether a chemical reaction has take place are as follow

• Change in state
• Change in colour
• Evolution of a gas

• change in temperature

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