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What mass of this substance must evaporate in order to freeze 230g of water initially at 16 degrees? (The heat of fusion of water is 334J/g the specific heat of water is 4.18J/g*k .) The heat of vaporization of is 289J/g .
The standard free energy of activation of a reaction A is 73.9kJ/mol-1 (17.7 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol-1 (2.39 kcal mol-1) mo..
A 2.00 gram sample of unknown gas is placed into a 296 mL flask at 17°C and found to have a pressure of 717 torr. What is the pressure (in kPa) if the sample is moved into a 200 mL flask at 352K
Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
the following compounds has the highest boiling point and which has the lowerst boiling point? explain your answer. a- CH3OCH3 b- CH3COOH c- CH3CH2CH3
A solution is prepared by dissolving 0.60g of nicotine in water to make 12mL of solution. The osmotic pressure of the solution is 7.55atm at 25 degrees C
The activation energy for a given reaction is kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased
Include constitutional isomers expect those with C-C double or triple bonds. For each constitutional isomer identify the functional group and identify if they are stereoisomers other than conformers
When bicarbonate is reacted with acid it releases CO2. How many moles of HCO3? did you start with if you collect 1.24 x 10 3 moles of CO2(g)?
Calculate the potential developed by a voltaic cell using the following reaction if all dissolved species are 0.025 M: 2 Fe2+ (aq) + H2O2 (aq) + 2 H+ (aq) ? 2 Fe3+ (aq) + 2 H2O (l)
What is the elution order if these same compounds are separated on a silica column using a polar solvent such as water?
at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?
When a 3.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.472 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCl in kJ/mol
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