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Liquid mixtures of sodium and potassium are used in some nuclear reactors as coolants that can survive the intense radiation inside reactor cores. Calculate the energy required as heat to melt 250 kg of sodium metal at 371 K.
Nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation N2(g)+3H2(g)->2NH3(g) deltaHrxn=-56 kJ.
A nuclear explosion generates so much heat that it turns steel structures in the immediate area into steel vapor. What is the correct name of the type of phase transition that is represented by this process
What are the concentrations of acetic acid and acetate ion in 0.35M acetate buffer,pH 4.60? the pKa of acetate is 4.76.
How many mL of 5.0 M NaOH can be added before its buffering capacity is exhausted?
what is the pH of the hydroflouric acid solution prior to adding sodium fluoride? (b) how many grams of sodium fluoride should be added to prepare the buffer solution? Neglect the small volume change that occurs when the sodium fluoride is added.
A large scale polycondensation reaction of a diol and a diacid is performed at 200 C. At various intervals small samples are removed, introduced into tared conical flasks, quenched in a dri ice/acetone, weighed, dissolved and titrated with a stand..
A weak acid with a starting concentration is 12.5% dissociated. a) Calculate the [H3O+], pH, [OH-] and pOH of the solution. ([OH-] = 1.1 × 10-13 M, pOH = 12.96
The reaction 2NO2 -> 2NO + O2 has the rate constant k= 0.65 M-1s-1. If the initial of NO2 is 7.30 x 10-2 M, how would you determine how long it would take for the concentration to decrease to 1.70 x 10-2M
Part A- Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 278.00 pm . Part-B What wavelength of light would have sufficient energy to ionize the atom
A gas occupies a volume of 140 mL at 35 celcius and 97 kpa. What is the volume of the gas at conditions of STP?
a sample of nitrogen gas occupies 1.55 L at 27.0 C and 1.00 atm pressure. What will the volume be -100 C and the same pressure?
What is the average velocity of nitrogen molecules at 24o C. At what temperature would oxygen molecules have the same average velocity as the N2 above
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