Consider the exothermic equilibrium 2i(g) ⇌ i2(g) what would be the effect on the position of equilibrium of a. increasing the total pressure on the system by decreasing its volume. (2 points) b. adding gaseous i2 to the reaction mixture. (2 points) c. decreasing the temperature. (2 points)

b) mutualism

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answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

answer: mercury

explanation: