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If the activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. Explain by what factor does the rate of reaction increase as the temperature increases from 247 to 279 oC? (The factor is the ratio of the rates.)
The solubility product of Mg (OH)2 is 1.2x10-11. Explain what minimum OH- concentration must be attained (for example, by adding NaOH) to make theMg2+ concentration in a solution of Mg(NO3)2 less than 1.0 x10-10M
When an acid or a base is added to a buffer, a double-displacement reaction will occur. The acid or base will be neutralized, forming a neutral salt or water plus the conjugate of the buffer.
If glass beads in the lab were replaced by a material with less surface area, will liquid seperation be better or worse. Why. Why should the recieveing flask be submersed under an ice bath when collecting isopropanol or acetone
How many moles of sulfur dioxide, SO2 are contained in a 5.0 L container at STP?
The reaction caused the temperature of the water to rise from 21.0 to 24.7 ^\circ \rm C. What is the enthalpy of this reaction. Assume that no heat is lost to the surroundings or to the coffee cup itself.
calculate the moles of calcium carbonate present in a 25.00 ml sample of standard assuming the standard is known to
An appropriate indicator is used. Ka for acetic acid is 1.7x10^-5. Calculate the pH in the flask after 300 mL of 0.100 M NaOH has been added
a tanker truck carrying 2.01times103 of concentrated sulfuric acid solution tips over and spills its load. the sulfuric
What is the equivalent weight of (MnO4). How many equivalents of electrons were delivered to the unknown soln
The atom then emits two photons: one of wavelength 1282.2 nm to reach an intermediate level and a second to return to the ground state. What was the wavelength of the second photon emitted?
A pure gold ring and pure silver ring have a total mass of 15.7 g. The two rings are heated to 65.3 degree celcius and dropped into a 13.3 mL of water at 21.2 degree celcius. When equilibrium is reached, the temperature of the water is 23.3 degree..
The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 x 10-8 g. Given that 1 g = 6.02 x 1023 amu,
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