A flask contains a mixture of compounds A and B. Both compounds decompose by first-order kinetics. The half-lives are 75.00 min for A and 10.00 min for B. If the concentrations of A and B are equal initially, how long will it take for the concentration of A to be four times that of B

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing