18. What coefficients can be used to balance the following equation? (2 points) K2CO3 + FeCl3 -> KCI + Fez (CO3)3
2, 2, 4, 1
O 3, 2, 6, 1
O 1, 1, 2,1
O 3, 3, 6, 1

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?