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The ionic substance T3U2 ionizes and produces ions as T2+and U3-ions. determine the value of the solubility-product constant if solubility of T3U2 =4.24× 10-20 mol/L.?
An object made of aluminum has a mass of 8.37g. When it was placed in a graduated cylinder containing 20.0mL of water, the water level rose to 23.1mL. Calculate the density and specific gravity of the object.
Water is composed of 11.2% hydrogen and 88.8% oxygen. What mass of water contains 16.0g of hydrogen?
Calculate the equilibrium constant at 24 K for a reaction with ?Ho = 10 kJ and ?So = (-100) J/K. (Don't round unil the end. Using the exponent enlarges any round-off error.)
A chemical reaction is known to occur spontaneously under standard conditions. Which of the following statements is/are true (more than one answer may be selected):
what is the standard free energy change for thisreaction? Substance ?G°f (kJ/mol) CH3CH2OH(l) - 174.9 O2(g) 0 CO2(g) -394.4 H2O(g) -228.6 Express the free energy change inkilojoules using five significant figures. ?G° = ? kJ
consider a hydrogen atom in the ground state. what is the energy of its electron? Now consider an excited- state hydrogen atom. what is the energy of the electron in the n=2 level
An iodine solution of unknown molarity was titrated against a 0.001M solution of S2O3^2-. The blue black iodine-starch complex just disappeared when 20.2 mL of thiosulfate was added. What is the exact molarity of the I2 solution.
A 255-mL sample of HCl solution reacts with excess Mg to produce 14.0 L H2 gas at STP. What is the molarity of the HCl solution?
A 1.29 g sample of stearic acid (C18H32O2), a common constituent of fats, is burned in a bomb calorimeter
being used as a membrane to purify nitrogen. if the flux of nitrogen through the member is 8.2*10^-7 kg/m^2-s, what is the production rate of nitrogen in g/h?
Determine the pH of each of the following solutions. (a) 0.382 M hypochlorous acid (weak acid with Ka = 3e-08). (b) 0.900 M hypoiodous acid (weak acid with Ka = 2.3e-11). (c) 0.597 M pyridine (weak base with Kb = 1.7e-09).
Atoms of different elements also have different sizes, just like kernels and marbles. Use the atomic radii given below to answer the following questions. Remember that the volume of a sphere is 4/3 × ? × radius3.
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