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calculate the pOH and the pH when 45.0mL of 3.00mol/L potassium hydroxide solution is diluted by adding 100.0mL of water
You have 47.2 mL of a solution of copper(II) chloride (CuCl2?). You need to determine the concentration of Cu2+ in the solution gravimetrically.
Calculate the molecular weight of the compound? Given that Kf=1.86 and the compound in not ionic.
If a 2.5 L reaction vessel initially contains 725 torr of cyclopropane at 485C , how long will it take for the partial pressure of cylclopropane to drop to below 105 torr?
Pyridine(C5H5N) is a weaker base in H2O than 2,6 lutidine (dimethylpyridine), but we observe that the pyridine-BF3 complex is more stable than the comparable lutidine-BF3. Explain the reason for this inversion in stabilities.
How much ice (in grams) would have to melt to lower the temperature of 355 mL of water from 24 C to 6 C (Assume the density of water is 1.0g/ml.
Determine the rate constant for the reaction at the temperature of 75 degree celsius?
What is the percentage composition of a compound consisting of carbon and hydrogen if 58g of the compound has only 10g of hydrogen.
If a nonvolatile, yellow crystalline solid sample of 0.351 g is dissolved in benzene (C 6 H 6 ) of 15.8 g formed a solution. this solution freezes at the temperature of 4.77 degree celsius.
Thermochemistry and Periodic Properties of Elements. State which atom is larger according to periodic trends. Explain the difference for each of the pairs.
Compute the amount of heat needed to completely sublime 43.0 grams of solid dry ice at its sublimation temperature. (The heat of sublimation for carbon dioxide =32.3).
A 500mL solution contains 1.68g NH3 and 4.05g (NH4)2SO4. How many mL of 12M HCl is needed to change the pH to 9.00?
Calculate the mass of urea that should be dissolved in 187 g of water at 35C to produce a solution with vapor pressure of 37.7 mmHg
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