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Calculate the [Cr+3] in equilibrium with Cr(OH)4-(aq) when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at a pH of 7.3. Kf for Cr(OH)4-(aq) is 8.0 x 1029.
2.0 x 10-3M7.9 x 10-6M3.1 x 10-8M1.6 x 1023M2.0 x 10-7M
calculate the weight of potassium chlorate required to prepare 380ml of wet oxygen collected over water at 20degrees
Atomic orbitals of carbon relative to methane in a cubic frame of reference.
What is the hydrogen ion concentration of a solution when 2.334ml of acetic acid (60.05 g/mole) and 2.082 grams of sodium acetate (82.04 g/mole) are added to 500ml of water?
what is the molarity of an NaOH solution if 25 mL of this solution reacts exactly with 22.3 mL of .253 molar sulfuric acid?
that the density of all solutions is 1.00 g/mL, and the volumes are additive. calculate the q for the reaction and calculate q for the neutralization of one mole of NaOH
Determine the mean and 90% confidence interval for the average fluoride concentration in this sample.
evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 per gram of water evaporated.
Calculate the volume the gas will occupy if the pressure is increased to 1.87 while the temperature is held constant.
A pipette is used to add 32 mL of 0.2 M Pb(NO3)2 to a 261.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8.
How can we explain the ability of an electron to cross through a node, such as the nucleus, to occupy the region within an entire orbital?
Determine the cell reaction, the standard cell potential (E0cell) and the half-cell that acts as the cathode for the voltaic cells composed of the following half-cells.
In an electrochemical cell, which of the following statements is FALSE? A. The cathode is the electrode where reduction occurs. B. The anode is electrode where oxidation occurs. C. A spontaneous electrochemical cell is called a galvanic cell. D. A..
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