19. some redox reactions are also classified as which of the following?
(points : 3)
acid-base

synthesis

single-displacement

decomposition

question 20. 20. if ions change places and a gas is formed, then what type of reaction is indicated?
(points : 3)
double-displacement

synthesis

decomposition

single-displacement

19.) Single-displacement is the correct answer.

20.) I am not sure, but Single-displacement is incorrect. At least you can cancel that one out.

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explanation:

is there any options? maybe im just not seeing them but i need the options to

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