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A beaker has a mass of 85.6 g when empty and 110 g when it contains 38.7 mL of pentane. What is the density of pentane?
The frequency of vibration in a quartz watch is 33 kHz. What is the energy required to excite this vibration? Also compute omega for this vibration.
A mixture of gas contains 46.3 % methane, 37.2% ethane and 16.5% propane(by mass). A 477g sample of the gass is burned with exces oxygen
At 700.°C, the total pressure of the system is found to be 3.45 atm. If the equilibrium constant KP is 1.52, calculate the equilibrium partial pressures of CO2 and CO.
Hydrochloric acid reacts with aluminum to form aluminum chloride and gseous hydrogen. What's the mass of aluminum required to produce 1.0kg of aluminum chloride if there is excess acid?
Isomeric products isolated from free-radical chlorination, Some isomeric products were isolated from the free-radical chlorination of (R)-sec-butyl chloride.
What evidence do you have that your product consists of a single geometric isomer or is a mixture of isomers? Does the melting point give such information
In a 0.34 M solution of sodium acetate, what concentration of hydronium ions comes from the self-ionization of water? pKb for acetate anion is 9.246
Calculate the pH after the following amounts of NaOH are added. A) 0mL NaOH added( before the titration started)
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
A 496-mL sample of a gas at 263 oC is cooled at constant pressure until its volume becomes 241 mL. What is the new temperature in oC?
calculate the amount of heat required to heat a 46 sample of ethanol from 10.0 to 18.0. specific heat capacity of
If the 300MHz 1H NMR spectrum of a compound has a doublet with one signal at 6.10ppm and the second signal at 6.05 ppm, the value of the coupling constant is?
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