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We have a situation where hydrogen gas at 300 degrees C is flowing out of a tube at the rate of 100mL/min. The tube is located in a fume hood operating at 25 degrees C and 1atm. What flow rate of air must be entering the hood so that the hydrogen gas does not pose a flammability hazard?
The normal melting points and boiling points of xenon are -112 deg. Celsius and -107 deg. Celsius, respectively. The Xe triple point is at -121 deg. Celsius and 282 torr, and its critical point is at 16.6 deg. C and 57.6 atm.
aniline c6h5nh2 kb 4.3 x 10-10 is a weak base used in the manufacture of dyes. calculate the value of kn for
Cobalt oxide, CoO, is a largely ionic compound. What coordination number and crystal structure would you expect for this oxide
The thermal decomposition of 30.9g of CaCO3 produced 12.4g calcium and 3.71g carbon. Calculate the mass of oxygen produced in this reaction.
a protein subunit from an enzyme is part of a research study and needs to be characterized. a total of 0.160 g of this
The empty calorimeter has a heat capacity of 0J/oC, and the temperature changed from 21.0 oC to 27.5 oC. Calculate the heat of reaction for the sample (kJ). Then calculate the heat of the above reaction in kJ/mol of HCl.
Determine the element of lowest atomic number that contains a complete d subshell in the ground state. element symbol
The specific heat of ethanol is 2.46 J/goC. Find the heat energy required to raise the temperature of 193 g of ethanol from 19oC to 35oC.
Dry air is 78% nitrogen gas, 21% oxygen gas, and 0.9% argon gas. These gases can be separated by distillation after the air is first converted to a liquid. In one of the steps in this process, filtered air is compressed enough to increase the pres..
calculate the change in internal energy for a system that is giving of 25.0 kJ of heat and is changing from 12.00 L to 6.00L in volume at 1.50 atm pressure.
Within the Bohr model of the hydrogen atom, the radius of the orbit for the ground state was 5.292 x 10-11 m. Using de Broglie's idea that the circumference of this orbit had to equal the wavelength of the electron
When 1 mol of HF is added to 1kg of water, the freezing point decreases by 1.9 C, but when 1 mol of HBr is added, the freezing point decreases by 3.7 C. Which is more highly separated into ions, HF or HBr
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