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DSC analysis of a polystyrene sample illustrated no peaks in the temperature interval studied. The DSC thermogram showed an inflection in both the heating along with cooling parts of the cycle which were mirror images of each other. Are there any phase transitions practical and if so what order are they?
a buffer is prepared by mixing .200 mole of formic acid with .300 mole of sodium formate in a volume of 200 ml what is the initial ph.
question an experimental car uses hydrogen as fuel and the tank that can hold gaseous hydrogen. the designers have two
As air flows across the cooling coil of an air conditioner at the rate of 3856 kg/hr, its temperature drops from 26*C to 12*C. Determine the internal energy change in kJ/hr.
Group A used 500 moles of styrene and 0.1 moles of benzoyl peroxide while Group B used the same amount of benzoyl peroxide as Group A but used less styrene,150 moles. What would the average molecular weight of each group's polymer sample be?
what is the minimum amount of 6.0 M H2SO4 necessary to produce 25.0 g of H2 according to the reaction between aluminum and sulfirc acid 2Al + 3H2SO4 ---> Al(SO4)3 + 3H2
The activation energy for a reaction is 55.5 kj/mol. if the rate constant for the reaction has a value of 1.35 * 10^2 s^-1 at 25 degrees Celsius what will it be at 95 degrees Celsius
A 6.9L balloon is filled with He at 1.00 bar pressure at 298k. How many He atoms are in the balloon?
A stellar object is emitting radiation at 3.75 mm. If the detector is capturing 3.3*10^8 protons per second at this wavelength, what is the total energy of the photons detected in one hour
To prepare a solution of 50% sulfuric acid, a dilute waste acid containing 28% h2SO4 is fortified with a purchased acid containing 96% H2SO4. How many kilograms of the purchased acid must be bought for each 100 kg of dilute acid
An isotonic solution will produce an osmotic pressure of 7.84 atm measured against pure water at human body temperature (37.0 °C). How many grams of sodium chloride must be dissolved in a liter of water to produce an isotonic solution
write the structural formula and the name of the organic product that would result from the hydrogenation addition of
Compute the concentrations of the ions as well as the molar solubility and the solubility product constant for salt at 25 Celsius. Step by step and the balanced reaction
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