Which of the following reactions is balanced?
O A. CaCl2 + 2H2CO3 → Cacoz + HCI
O B. CaCl2 + H2CO3 → 2CaCO3 + HCI
O C. CaCl2 + H2CO3 -> CaCo3 + HCI
O D. CaCl2 + H2CO3 → CaCo3 + 2HCI

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid