liayad16 liayad16
  • 01-06-2018
  • Chemistry
contestada

What are the four observations that confirm that a chemical reaction is happening?

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Raven678 Raven678
  • 01-06-2018
1.) Precipitate is formed 
2.) Odour 
3.) Heat is emitted ( change in temperature) 
4.) Formation of a Gas
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