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Define when 0.593 g of an unknown solute is dissolved in 14.9 g of water; the freezing point is depressed by 1.74 Celsius degree. Evaluate the molecular weight of the unknown solute, assuming that it is a nonelectrolyte
What are the advantages of the Stock system of nomenclature over the former one?
A mixture of 0.160 moles of C is reacted with 0.117 moles of O2 in a sealed 10.0L vessel at 500.K, producing a mixture of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO? 3C + 2O2---> 2CO +CO2
The quality of a two-phase liquid-vapor mixture of H2O at 40Oc with a specific volume of 10m3/Kg is
The standard enthalpy of formation of NH3(g) is -46.0 kJ/mol. Calculate the thermal energy evolved when 8.0g of H2(g) react with an excess of N2(g).
Gas cylinder A has a volume of 48.2 L and contains N2(g) at 8.35 atm at 25 ºC. Gas cylinder B, of unknown volume, contains He(g) at 9.50 atm at 25 ºC
What is the charge on magnesium iodide? What does the charge on the magnesium ion have to do with the number of valence electrons that an atom of magnesium has?
The alkalinity of water is 150 mg/L as CaCO3. How much H2SO4 (as both CaCO3 and H2SO4) will it take to lower the alkalinity 60 mg/L
A 5.5 g sample of metal at 100.0 degrees celsius is placed in a calorimeter with 20.0 g of water at 15.0 degree celsius. If the temperature of the water rises to 21.0 degrees celsius, what is the specific heat of the metal?
You have a solid A with an impurity B and you would like to purify A. Your initial? mixture is 80% A and 20% B (where A and B have the same molecular weight). As often occurs in organic chemistry, both the impurity and the desired component in a s..
Calculate O's aqueous solubility in surface waters of this lake. B.) Will the amount of O2 produced by photosynthesis cause O2's aqueous solubility to be exceeded in 1L of this lake water
what is the molar mass of toluene of 0.85g of toluene depresses the freezing point of 100g of benzene by 0.47cdegrees?
compute the amount of heat essential to fully sublime ninety grams of solid dry ice co2 at its temperature of
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