The rate of chemical reaction is: a) change in the concentration of any of the reaction participants per unit time (at constant

pressure);

b) change in the concentration of any of the reaction participants per unit

time (at constant volume);

C) a change in the number of moles of any of the reaction participants per unit time (at constant

pressure);

d) a change in the number of moles of any of the reaction participants per unit time (at constant

volume).​

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