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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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