Consider a buffer composed of the weak acid ha and its conjugate base a−. part a which pair of concentrations results in the most effective buffer? which pair of concentrations results in the most effective buffer? 0.90 m ha; 0.10 m a− 0.50 m ha; 0.50 m a− 0.10 m ha; 0.90 m a− 0.10 m ha; 0.10 m a−

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump