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Ethanol, C2H5OH, boils at 78.29 degrees celsius. How much energy, in joules, is required to raise the temperature of 1.00 kg of ethanol from 20.0 deg C to the boiling point and then to change the liquid to vapor at that temperature? (the specific heat capacity of liquid ethanol is 2.44 J/g x K, and its enthalpy of vaporization is 855 J/g.)
A 50.0 gram piece of iron at 152 degrees celsius is dropped into a 20.0 grams of Water at 89 degrees Celsius in an open thermally insulated container. How much water would you expect to vaporize, assuming no water splashes out?
a solution is prepared by combining 11.7 grams of sodium hydroxide in approximately 450 mili litres of h2o in a
The kinetic energy of the ejected electron is given by 1/2 mv2= h v -?. where m and v are the mass and velocity of the electron
Does your spectrum allow you to confirm that the structure of the product is a combination of the two reactants. Briefly explain.
A reverse osmosis plant desalinates 5x10^6 L/day of feedwater containing 1500mg/L of salts yielding 3x10^6 L/day of product water with 75 mg/L of salt. What would the salt concentration be in the brine?
the carbon-14 decay rate of a sample obtained from a young tree is 0.238 disintegration per second per gram of the
For each reaction below, (a) identify the oxidation states of the atoms and (b) identify the oxidant, reductant, species oxidized, and species reduced.
at 900K the following reaction has kp=.345: 2SO2(g)+O2(g)-->2SO3(g) Partial pressures of SO2 is .150 and of O2 is .455. What is the equilibrium partial pressure of SO3?
A food chemist determines that an increase in temperature from 50 to 60 degrees Celcius increases the initial rate of this reaction by a factor of 2.12 (all other initial conditions were kept constant). What is the activation barrier for this este..
Molecular weight and mole concept explained in this solution, The molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255
Nitrogen forms several gaseous oxides. One of them has a density of 1.27 g L-1 measured at 764 mmHg and 150C. write the formula of the compound
how many millimoles of HNO3 are needed to react completely with a .2800 gram piece of copper wire.
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