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Physical Chemistry
State five assumptions of kinetic theory of gases
Physical Chemistry
Why the periodic table can't be arranged in alphabetical order? What is the difference between the modern periodic table and the periodic table in alphabetical order?
Physical Chemistry
Use Hess’s law to determine the heat of combustion of 1 mole of frozen propanol, C3H8O(s). Propanol is a liquid under standard conditions. You have to write down and use the appropriate chemical reactions. [Given: ∆Hfo[CO2(g)] = -210 kJ; ∆Hfo[(C3H8O(l)] = -495 kJ; ∆Hfo[H2O(l)] = -315 kJ; ∆Hocrystallisation[(C3H8O(s)] = -95 kJ].
Physical Chemistry
Based on you understanding of what causes rigor mortis, deduce how rigor mortis can be hastened on the site of the most active muscle before dead. Explain
Physical Chemistry
CHANGPCHEM1 6.P.028.
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At 288 K, the vapor pressure of pure water is 12.79 mmHg and that of seawater is 12.54 mmHg. Assuming that seawater contains only NaCl, estimate its concentration. (Hint: Sodium chloride is a strong electrolyte. The density of water at this temperature is 0.99910 g·cm−3.)
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At 288 K, the vapor pressure of pure water is 12.79 mmHg and that of seawater is 12.54 mmHg. Assuming that seawater contains only NaCl, estimate its concentration. (Hint: Sodium chloride is a strong electrolyte. The density of water at this temperature is 0.99910 g·cm−3.)
Physical Chemistry
How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atmospheres and a temperature of 340 K?
Physical Chemistry
A certain reaction is spontaneous at 90.°C. If the enthalpy change for the reaction is 30. kJ, what is the minimum value of
Δr S (in joules per kelvin) for the reaction?
Physical Chemistry
An air bag needs 60 dm3 of gas to inflate it at 25°C. Calculate: 1.1 the number of moles of N2 gas at 298 K required to inflate the air bag to a pressure of 1 atm. (7) 1.2 the number of moles of NaN3 required to produce this amount of gas (Hint: NaN3 reacts to produce Na(s) and N2(g). (5) 1.3 the mass of NaN3 required.
Physical Chemistry
What are the possible sets of quantum number that can describe a 2p electron in an atom?
Physical Chemistry
HCl solution consists of 28% HCl by mass and has a density of 1.14g/ml. Find volume of the solution required to react with 1.87g Al as in the reaction:
2Al + 6HCl = 2AlCl3 + 3H2
2Al + 6HCl = 2AlCl3 + 3H2
