18. When a chemical reaction takes place in an open system, matter_____. (A) can enter from the surroundings, but cannot escape to the surroundings (B) can enter from or escape to the surroundings (C)

18. When a chemical reaction takes place in an open system, matter_____.

(A) can enter from the surroundings, but cannot escape to the surroundings
(B) can enter from or escape to the surroundings
(C) can escape to the surroundings, but not enter from the surroundings
(D) is not allowed to enter from or escape to the surroundings

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18. When a chemical reaction takes place in an open system, matter_____. (A) can enter from the surroundings, but cannot escape to the surroundings (B) can enter from or escape …

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