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Calcium hydroxide is used in leather tanning to remove hair from hides. For a 0.005 M solution of Ca(OH)2, calculate: [H3O+]=[1] (use scientific notation and no spaces. E.g., write 1.0e-6 for 1.0×10^-6) pH=[2] (use 3 digits to the right of the decimal), [OH–]=[3] (use 3 digits to the right of the decimal), pOH=[4] (use 3 digits to the right of the decimal).

Which Skill Component best describes a fan at a baseball game catching a foul ball?

Consider the reaction: A(g) ⇄ B(g), ∆H = −20 kJ. A reaction vessel at 25°C initially contains 1.0 M A. When equilibrium is reached, the concentration of B is 0.33 M. Then, the temperature is increased to 50°C. What is the concentration of A when the system re-attains equilibrium at 50°C?

The following reaction is at equilibrium at one atmosphere, in a closed container.   NaOH(s)   +   CO2(g)    ⇌   NaHCO3(s)     ∆H < 0     Which of the following will shift the equilibrium towards reactants?  (You must select ALL of the correct answers and NO incorrect answers in order to receive full credit)     

Explain why ecologists construct life tables and describe what information is required to develop them.

________________________ law are principles that are derived from court decisions to resolve disputes, conflicts.

Match the movement with the description. 

Isometric has a concentric (muscle shortens) and eccentric (muscle lengthens) movement.

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An old pine tree in the front yard is beginning to die as the neighborhood deciduous trees have grown. Why might this be?