Explain the hydroxide ion concentration of an aqueous
1. What is the hydroxide ion concentration of an aqueous0.00353 M caffeine solution? The most basic nitrogen atom in caffeine has a Kb of 4.1 x10-4.
2. Amonoprotic acid has a ka = 55x 10-7.What is the [H+] in a 0.060 M solution?
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A concentration cell consists of two H2/H+half cells. Half cell A has H2 at 0.76 atm bubbling into 0.27M HCl. Half cell B has H2 at 0.54 atm bubbling into 1.7M HCl. Which half cell houses the anode?
A six-faced die is loaded in such a way that an even number is three times as likely to occur as an odd number. (The die is no longer `fair'.) If C is the event that an odd number occurs on a single toss of the die, nd P(C).
A large flat plate is subjected to constant amplitude uniaxial cyclic tensile and compressive stresses. Compute the critical crack length if the fatigue life must be at least 3x106 cycles.
Find the mean daily revenue. Assuming X1, X2, and X3 to be independant, find the standard deviation of the daily revenue.
What is the hydroxide ion concentration of an aqueous 0.00353 M caffeine solution? The most basic nitrogen atom in caffeine has a Kb of 4.1 x10-4.
Two 11 cm-diameter charged disks face each other, 24 cm apart. Both disks are charged to - 30 nC. What is the electric field strength a point on the axis 5.0 cm from one disk between them?
The pH an acid solution is 5.45. Calculate the Kafor the monoprotic acid. The initial acid concentration is0.010M. What is the original molarity of a solution of ammonia whose pH is 11.02?
What is the angular acceleration in the second training exercise?
Two flows of H20, one of which is a saturated vapor at 0.6 MPa and the other of which is at 0.6 MPa, 600degC, mix adiabatically in a steady-flow process to produce a single outflow at 0.6 MPa, 400degC.
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