Calculate what is the molar mass of the solute
Pure benzene has a normal freezing point of 5.5°C. a solution containing 11.4g of a molecular substance dissolved in 150.0g of benzene (Kf=5.12°C/m) has a freezing point of 1.20°C. what is the molar mass of the solute?
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The system is under both mechanical and thermal equilibrium. Calculate the entropy and Gibbs energy of mixing when the patrition is removed, Assume that the gases are perfect.
0.80 g of sulfur is combusted to form SO2. All ofteh heat evolved is used to raise the temperature of 100.0 g of water by 17.8 K. Specific heat of water is 4.813 J/g K. Calculate the heat of combustion of 1 mol of sulfur.
Nitrous Oxide (N2O) is oxidized byoxygen(O2) to produce nitrogen dioxide(NO2).If 6.0 mol N2O reacts with 8.0 mol O2 toproduce as much NO2 as possible, then how many moles of which reactant remains?
A pure rock sample believed to be pure calcium carbonate is subjected to chemical analysis and found to contain 51.3% Calcium, 7.7% Carbon and 41.0% Oxygen by mass. Why can't this rock sample be pure Calcium Carbonate.
Assuming that the mechanism has only one step, and that the products are 47 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions.
Does refining/isolation of nitrogen from liquid air usingfractional distillation cause any pollution or any environmental problems?
The work input to the control volume is 240 kJ per kg of air flowing.determine the heat transfer rate, in kW. Evaluate the properties of air using variable specific heats.
If the paradichlorobenzene sublimes, how will this affectthe calculation of the molar mass of your unknown? Explain why the freezing point of a pure solvent hasa "plateau" instead of a continuous downward trend?
You add 7ml of 6M NaoH to a flask and diluted with water to a final volume of 400ml with water. Neutralization required 21.45ml of the base solution when titrating 20.00ml of a 1.005 HCl solution.
Combustion of 1.96g of a compound containing only hydrogen and carbon produced 6.35g of CO2 and 2.25g of H2O. The molecular weight of the unknown hydrocarbon was determined by mass spectroscopy to be 82.1 g/mol.
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