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How many kilojoules are needed to raise the temperature of 325 g of water from 15.0C to 77.0C? How many kilojoules are needed to raise the temperature of 325 g of water from 15.5C to 77.5C?
From your current perspective, what do you think the greatest threat is to human health resulting from pollution? Why do you think so?
Determine how do you find out the new freezing point of a solution if given the formula is Delta T = m x kf x i but how do you find it how does it work?
The pH of a dimethylamine aqueous solution is 11.98. (CH3)2NH + H2O ? (CH3)2NH2+ + OH-, The dimethylamine solution is 0.146 M a) Calculate the Kb value for dimethylamine.
Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")
Consider a 53.5 g sample of H2O(g) at 117°C. What phase or phases are present when 134 kJ of energy is removed from this sample.
In the purification process, the organic layer is washed sequentially with 2 M NaOH, water, and saturated aqueous sodium chloride. What is the purpose of each of these washes and why is cold 2 M NaOH recommended?
A zero-order reaction has a constant rate of 3.40×10?4 M/s . If after 30.0 seconds the concentration has dropped to 8.00×10?2 M , what was the initial concentration
What are the most important kinds of INTERmolecular forces present in each of the following substances
Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution.
For gases, the canonical partition function, Q, is related to the molecular partition function q by Q = q^N/N!. Use the expression for q and general thermodynamic relations to derive the perfect gas law pV = nRT.
aluminum and oxygen react to form aluminum oxide. How many L of oxygen at 296K and 1.4 atm of pressure are necessary to form 3.25g of aluminum oxide.
A solution is prepared by mixing 75.0 mL of 0.030 M BaCl2 and 250. mL of 0.040 M K2SO4. What are the concentrations of barium and sulfate ions in this solution? Assume only SO42- ions (no HSO4-) are present.
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