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The complete combustion of salicylic acid releases 21.90 kJ of energy per gram of salicylic acid. In a particular bomb calorimeter (initially at room temperature), the combustion of 0.1288 g of salicylic acid, in the presence of excess oxygen, causes the temperature of the calorimeter to rise by 1.36 °C. When a 0.3918-g sample of an unknown organic substance is similarly burned in the same calorimeter, the temperature rises by 3.60 °C. What is the energy of combustion per unit mass of the unknown substance?
A line in the Paschen series of hydrogen has a wavelength of 1280nm. From what state electron originate ?
If a wave has a frequency of 6.9536 x 109 Hz and an energy of 4.6076 x 10-24 J, what is the speed of light.
Despite that allylic radical can have only 2 resonance structures versus 5 resonance structures for benzylic radical, why allylic radical benzylic radical in stability.
Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 0.195 M in C2H5NH2 and 0.155 M in C2H5NH3Br. Express your answer using two decimal places.
Assuming that the process is working as intended, draw and label the flowchart, do the degree-of-freedom analysis, and estimate the molar flow rate (lb-mole/h) of the humidified outlet air.
What sign. info about atomic structure came from the Millikan experiment using charged oil drops
If the coal is burned in teh DPH power plant that uses 2300 tons of coal per day, what is the daily production of calcium sulfite, if the conversion is 98%? if 50 pounds of calcium oxide costa $13.50 how much does DPH power plant per day for CaO
volume of methane gas is cooled from 298 K to 149 L. If the pressure remains constant, what is the final volume?
Calculate the pH of 0.100 L of a buffer solution that is 0.25 M in HF and 0.50 in NaF. What is the change in pH on addition of the following? a) 0.002 mol of HNO3 b) 0.004 mol of KOH
Isooctane (2,2,4-trimethylpentate), one of the many hydrocarbons that make up gasoline, burns in air to give water and carbon dioxide.
during an acid-base titration 23.3 ml of hcl completely neutralized 19.5 ml of potassium hydroxide 0.315 m. calculate
If 13.0g of CCl3F is enclosed in a 1.2-L container, what mass of liquid will be present, when the vapor pressure of CCl3F at 300K is 856 torr?
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