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What concentration of aqueous NH3 is necessary to just start precipitation of Mn(OH)2 from a 0.020 M solution of MnSO4? Kb for ammonia is 1.8 x 10-5, Ksp for Mn(OH)2 is 4.6 x 10-14
c5h12, to Co2 and H20 is -3536.3 kJ/mol. What is the enthalpy of formation of pentane at 25 degrees celcuius?
Phosphorus is combined with chlorine to give PClz a gaseous compound .calculate the value of z If you start with 2.097g of P and isolate 9.298g of PCLz .
A 36.3 mL aliquot of 0.0529 M H2SO4 (aq) is to be titrated with 0.0411 M NaOH (aq). What volume (mL) of base will it take to reach the equivalence point?
What mass of rm NaOH is needed to precipitate the rm Cd^{2+} ions from 35.0 mL of 0.540 M rm Cd(NO_3)_2 solution?
a 255-mL sample of a HCl solution reacts with excess Ca to produce 14.0 L of H2 gas at STP. what is the molarity (M) of the HCl solution? Ca(s) + 2HCl(aq) > CaCl2(aq) + H2(g)
What is the osmotic pressure developed at 17 oC by an aqueous solution that is 0.111 M in AlCl3
6.00 mL of this solution was mixed with 77.00 mL of a solution of potassium nitrate and 68.70 mL of a solution of ammonium chloride. What is the molarity of Nacl in the final solution?
to reach equilibrium (at pH 7.00) through titration by adding 14.25 mL of 0.2030 M NaOH to 20 mL of this solution. What is the Molarity of the acid?
You have a solution of NaCl dissolved in water. Describle a method by which these two compounds could be separated.
Why must we know both in order to explain the physical properties of the molecule. physical properties to be considered are solubility and the points when the molecule changes states
The solution has a vapor pressure of 262 . Pure pentane and hexane have vapor pressures of 425 and 151 , respectively, at room temperature.What is the mole fraction of hexane? (Assume ideal behavior.)
For the following acid-base equilibrium, label the stronger acid, stronger base, weaker acid, and weaker base. Predict whether the position of equilibrium lies toward the right
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