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A 1.29 g sample of stearic acid (C18H32O2), a common constituent of fats, is burned in a bomb calorimeter. The temperature of the calorimeter increases by 25.4oC (Celsius). Given that the energy of combustion (?E) for stearic is -40.5 kJ/g, calculate the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.
Iridium-192 has a half-life of 74 days. What fraction of a sample of this isotope will remain after 222 days
A piece of Iron weighing 85.690 g was burned in the air. The mass of the iron oxide produced was 118.350 g. What are the moles of iron in the original sample. What is the mass of oxygen in the iron oxide. What is the moles of oxygen in the iron ox..
the average number of collisions per cubic meter per second for the molecules of argon at 0 degree Celsius and 1 bar of pressure. (d) what values would be obtained at 1000 degree celsius and 1 bar? (e) At 0 degree celsius and 100 bar
How much would the beaker and its content weigh if it was completely filled with mercury? The density of mercury is d = 13.5 g/mL ? = g
An oxygen molecule is adsorbed onto a small patch of the surface of a catalyst. It's known that the molecule is adsorbed on 1 of 36 possible sites for adsorption
A 0.481 gram sample of an unknown acid (HX) required 28.95 mL of 0.2103 M NaOH for neutralization to the phenolphthalein end point. What is the molar mass of the acid
Calculate the mass of pure water recovered per mass of water in the process feed. A.3) Calculate the weight percent of salt leaving the 5th evaporator. (Note: Thoughtful selection of control volume can save you a lot of algebra.)
When 2.25 g of sodium hydroxide (NaOH) was dissolved in 150.00 g of water a value of 11.00oC was obtained for ?T. Calculate the molarity of the sodium hydroxide solution. _______ Calculate the value (calories) for the heat of solution of 2.25 g of..
Hydrogen is collected over water at .975 atm and 28 degrees Celsius. What is the partial pressure of H2?
For one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 3.
The freezing temperature of ethanol is -114.0 oC, the density is 0.789 g/cm3, and Kf is 1.99oC/m. Calculate the new freezing point when 0.100 L of methanol
stock soultions of thris base and tris acid how much of each would you use to make 100ml
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