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A diprotic acid, H 2 A, has acid dissociation constants of K a1 = 2.27 * 10 - 4 and K a2 = 4.00 * 10 - 11. Calculate the pH and molar concentrations of H 2 A, HA -, and A 2 - at equilibrium for each of the solutions. A 0.103 M solution of H 2 A.

The amount of heat transferred from an object depends on which of the following? a. the specific heat of the object b. the initial temperature of the object c. the mass of the object d. all of the above

Living things use specially shaped protein catalysts called

A steel tank is completely filled with 1.90 m3 of ethanol when both the tank and the ethanol are at 32.0c. when the tank and its contents have cooled to 18.0c, what additional volume of ethanol can be put into the tank?

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Which set of factors changes igneous or sedimentary rock into metamorphic rock? heat and weathering water and weathering heat and pressure water and pressure

What is the standard cell potential (E°cell) for the voltaic cell based on the reaction below? Sn2 + (aq) + 2Fe3 + (aq) → 2Fe2 + (aq) + Sn4 + (aq)

G oil of wintergreen, c8h8o3 is prepared when methanol, ch3oh, is reacted with salicylic acid, c7h6o3. what is the percent yield of a reaction in which 15.3 g of oil of wintergreen is collected after 16.

How can a neutral atom become a positively-charged particle?

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.