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When Aqueous solutions of Pb(NO3)2 and Na2SO4 are mixed, a precipitate of PbSO4 is formed. Calculate the mass of PbSO4 formed when 655 mL of 0.150 M Pb(NO3)2 and 525 mL of 0.0751 M Na2SO4 are mixed.
Pb(NO3)2 + Na2SO4 --> PbSO4 + 2NaNO3
Menthol is a crystalline substance with a peppermint taste and odor. When 0.705 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 3.76 °C.
1.00 x 10-2 M Mg(NO3)2 and 250 ml of 1.00 x 10-1 M NaF.Calculate the concentrations of Mg2+ and F- at equilibrium with solid MgF2 (Ksp of MgF2 = 6.4 x 10-9).
a specific heat of 0.061 cal/g C and at a temp of 99.1C is added to 85.0 grams of water at 23.5C What will be the final temp of the water when equilibrium is reached?
What is the structure of the product of Diels-Alder reaction of (E,E)-2,4-hexadien-1-ol with maleic anhydride?
If 0.420 mol of a nonvolatile nonelectrolyte are dissolved in 3.90 mol of water, what is the vapor pressure PH2O of the resulting solution. The vapor pressure of pure water is 23.8 torr at 25.0 degrees C. Express your answer numerically in torr.
Determine hydroxyl and hydrogen ion concentration in this solution. (if Ka for ammonium ion = 5.0 x 10^-10.)
What is the freezing point of a 0.19 m Solution of glucose C6H12O6 in water. (Kf for water is 1.858 degrees C/m)
the active ingredient in toothpaste is sodium fluoride an anticavity agent. a 170 g tube of toothpaste lists the
what is the molar mass of the gas in a glass bulb with a volume of 2.50 l at a temperature of 22 degrees c and a
Which reaction responds more strongly to changes of temperature, one with an activation energy of 52 kJ mol-1 or one with an activation energy of 25 kJ mol-1
a) decreasing the volume of a gas b) melting a solid c) chemical reactions that increase the number of moles of gas d) forming mixtures from pure substances e)increasing the temperature of a gas
Two identical beads each have a mass m and charge q. when placed in a hemispherical bowl of radius R with frictionless, nonconducting walls, the beads move, and at equilibrium,
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