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which two ions have the same electron configuration in the ground state (a) Rb+ and Ca+ (b) Ba2+ and I- (c) Se2+ And I- (d) Fe2+ and Fe3+
The pH of a bicarbonate-carbonic acid buffer is 8.00. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
What is the pKa for the acid HA if a solution of 0.65 M HA and 0.85 M NaA has a pH of 4.75?
Need to make an aqueous solution of 0.233 M potassium iodide for an experiment in lab, using a 250 mL volumetric flask. How much solid potassium iodide should you add?
Consider the cell prepared with 2.0 M Cd2+ and 0.45 M Zn2+ solutions: Zn(s) + Cd2+(aq) --- Zn2+(aq) + Cd(s)
how does a large electronegativity difference affect molecular properties?1. it makes the bonds stronger and shorter
Enough Al2(SO4)3 solid is added to water to prepare 100.0 mL of a 0.150 M solution of aluminum sulfate. What is the concentration of sulfate ion in solution?
In the equation HSO4- + H2O SO4-2 + H3O+, if the Ka is 1.5 x 10 ^-2 and HSO4- = 1.0 M at equilibrium, what is the pH of this solution?
Liquid phenol (C6H5OH) flows through a pipe with a mass flow rate of 83.0 g/s. Given that the density of phenol is 1.0576 g/cm3
What is frequency of chemical shift at 1.25 ppm if 400 MHz NMR spectrometer is used
how many moles of oxygen are present in 1.500 liters of oxygen gas?
Express the concentration of a .0560 M aqueous solution of flouride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00g/mL.
How many grams of CH4 must be burned to release 554 kJ of heat based on this thermochemical equation:
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