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To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. A chemical engineer places a mixture of noble gases consisting of 5.25 g of He, 14.6 g of Ne, and 33.3 g of Kr in a piston-cylinder assembly at STP. Calculate the partial pressure of each gas.
(a)PHe = atm(b)PNe = atm(c)PKr = atm
determine the freezing point of this solution If 18.0 grams of a nonelectrolyte that has molar mass = 44.2 g/mol are combined with 110.0 grams of the solvent,?
A 4.78- sample of aluminum completely reacts with oxygen to form 6.67 of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide.
Ammonia, NH3, reacts with the hypochlorite ion, OCl-, to produce hydrazine, N2H4. How many moles of hydrazine are produced from 5.85 mol of ammonia if the reaction has a 78.2%
A compound with a formula C10H16 takes up one mole of H2 on catalytic hydrogenation. Give possible structures for it. If it takes up two moles of hydrogen on reduction, give one structure that fits this information.
How would the ground-state energy levels of X and H compare and would the energy of an electron in the n = 2 level of H be higher or lower than that of an electron in the n = 2 level of X? Explain your answer.
Ammonia is kept in a cylinder with a movable piston at 25°C and 2.50atm. What is the pressure in the cylinder if the temperature is increased to 45 °C and the piston is raised so that the volume occupied by the gas is doubled
An element has a mass of 207 and has 125 neutron in its nucleus. how many protons and electrons does it have and where are they located
What explanation can you give as to why a dilute aqueous solution of PtCl42- is pale yellow to colorless, but a concentrated solution is deep red
A lab bench has 3 one L stoppered flasks. Flask A contains one mole of NH3 gas. Flask B contains one mole of N2 gas & Flask C contains one mole of SO2 gas. All are at the same temperature.
The free induction decay of a single kind of proton is an exponentially decreasing cosine wave. Explain how this signal is obtained. How do we convert this signal into an NMR spectrum. What does the spectrum look like
what are the freezing point and boiling point of an aqueous solution of 15.5g glucose (c6h12o6) dissolved in 150 g of water?
Derive an expression for (dH/dp)T soley in terms of T, p, V. Show that this quantity is identically zero for an ideal gas and find the equivalent expression for a van der Waals gas
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