An acid-base indicator, hln, dissociates according to the following reaction in an aqueous solution. hinlag) in (aq) h (aq) the protonated form of the indicator, hln, has a molar absorptivity of 2929 m cm 1 and the deprotonated form, in has a molar absorptivity of 20060 m-1. cm 1 at 440 nm. the ph of a solution containing a mixture of hin and in s adjusted to 6.12. the total concentration of hin and in s 0.000127 m. the absorbance of this solution was measured at 440 nm in a 1.00 cm cuvette and was determined to be 0.818. calculate pka for hin.

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give