Question

When chemical reactions occur,

The physical and chemical properties of the reactants are the same as the properties of the products
The physical and chemical properties of the products are different from the reactants
The compounds can be separated by physical means
A phase change takes place

Answer 1

The answer is: the physical and chemical properties of the reactants are the same as the properties of the products

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Step-by-step explanation:

Answer 2

the physical and chemical properties of the products Are different from the reactants. This causes the changes to be seen, physical changes and chemical.