In a 0.100M solution of a weak polyprotic acid what is the equilibrium concentration of A-2? H2A+H20-H30+A-2

Ka1=7.5x10^-5
Ka2=6.2x10^-8

answer= ?x10^?

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

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.

Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment?