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  • 25-02-2019
  • Chemistry
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HOW CAN YOU TELL THAT A CHEMICAL HABGE HAS OCCURRED. PLZ HELP

HOW CAN YOU TELL THAT A CHEMICAL HABGE HAS OCCURRED PLZ HELP class=

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Аноним Аноним
  • 25-02-2019

That is choice A.

The products are different from the reactants.

This may be easy to see - for example when one of the products is precipitated, like when you add BaCL2 to Na2SO4.  The BaSO4 formed is insoluble in water and appears as a white precipitate.

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