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If an unknown substance with the formula Ba(subscript x)Cl(subscript y)•(variable z)H(subscript 2)O was added to water and Na(subscript 2)HPO(subscript 4), the precipitate formed is Barium phosphate. What is the net ionic equation for this precipitation reaction, balanced?
What volume of gold would be equal in mass to a piece of copper with a volume of 140.0 mL? The density of gold is 19.3 g/mL; density of copper is 8.96 g/mL
Calculate the pH of a buffer solution that contains 0.10 M NaH2PO4 and 0.50 M Na2HPO4. The Ka of H2PO4- is 6.3 x 10-8 Question options: 1) pH = 7.90 2) pH = 6.50 3) pH = 7.60 4) pH = 6.80
Glycerol, C3H8O3, is a water-soluble liquid of density 1.2656 g/ml at 15oC. Calculate the molarity of a solution of glycerol made by dissolving 40.000 ml glycerol at 15oC in enough water to make 250.000 ml of solution.
Write a balanced equation for the reaction of NaCH3COO and HCl. Express your answer as a chemical equation.
Diamond has a face-centered cubic unit cell, with four more C atoms in tetrahedral holes within the cell. Densities of diamonds vary from 3.01 g/cm3 to 3.52 g/cm3 because C atoms are missing from some holes.
What information is gained from VSEPR analysis? What is Valence Bond Theory?
Standard reduction potentials for the Pb2+/Pb and Cd2+/Cd half-reactions are -0.13 and -0.40, respectively. At what relative concentrations of Pb2+ and Cd2+
What concentration of aqueous NaCl solution freezes at -15.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
The equilibrium vapor pressures of water at 25*C and 50*C are 3.16 kPa and 12.51 kPa, respectively. Consider a 1.00 L sample of air at 50*C, with 45% relative humidity, trapped in a rigid cylinder. Suddenly the temperature of the gas is reduced to..
what is happening to the observed cell potential, Ecell and E0Cell as Zn2+ increases and Cu2+ decreases?
A reaction that is spontaneous can be described as a releasing heat to the surroundings. b. increasing in disorder. c.proceeding in both the forward and reverse directions.
Describe how you would prepare the following aqueous solution: 230 g of a solution that is 0.60 molal Na2CO3 starting with the solid solute.
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