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You add 1 kg of ethylene glycol (C2H6O2) antifreeze to 4500g of H2O in your car’s radiator. What would be the freezing point of the solution?
A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 150 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?
What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 15g sucrose (C12H22O11) in 100g of ethanol (C2H5OH) is 58 mmHg?
5 mL of nitric acid, HNO3, are required to react with 50 mL of a 1.25 M Barium hydroxide, Ba(OH)2 solution:
2 HNO3 (aq) + Ba(OH)2 (aq) --> 2 H2O (aq) + Ba(NO3)2 (aq)
Determine the concentration (Molarity) of the nitric acid solution (HNO3).
How many mL of 0.250 M barium nitrate are required to precipitate as barium sulfate all the sulfate ions from 50 mL of 0.350 M aluminum sulfate?
3 Ba(NO3)2 (aq) + Al2(SO4)3 (aq) --> 3 BaSO4 (s) + 2 Al(NO3)3 (aq)
Hydrogen peroxide (H2O2) is a powerful oxidizing agent used in concentrated solution in rocket fuels and in diluted solutions is hair bleach. An Aqueous solution of 25% (m/m) has a density of 1.05 g/ml. Calculate the concentration in terms of:
a. Mole Fraction of H2O2
b. Molarity
An ethanol solution is prepared by dissolving 15 mL of ethanol (C2H5OH) (density: 0.850 g/ml) in a sufficient volume of water to produce 120 mL of solution with a density of 0.980 g/mL. What is the concentration of ethanol in this solution expressed as:
a. Volume percent
b. Mass percent
c. Mass/volume percent
d. Mole fraction of Ethanol
e. Molarity
f. Molality
Calculate the molarity and molality of an NH3 solution made up of 35.0 g of NH3 in 75.0 g of water. The density of the solution is 0.982 g/mL
Calculate the selectivity towards the main product B in the following first order kinetics reactions at 100°C and at 20°C.
A → B, k0 = 109, EA = 60 kJ
A → C, k0 = 1012, EA = 80 kJ
A given mass of a gas occupies 150cm cube at 20 degrees Celsius and pressure at 1.013*(10*5) Newton per meter. Calculate the temperature at which the volume is doubled at the same pressure?
