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#1) For the following reaction at 25oC, ΔHo= -1069 kJ and ΔSo= 289 J/K
A +4B → 3C + 3D
What is ΔGoat 442oC in kJ?
#2) A stock solution of NaOH is 0.800 M. What volume of this solution (in mL) is needed to prepare 2.00 L of 0.290 M NaOH?
If solar radiation is 1200 W/m^2 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation. A green leaf has a surface area of 2.75 cm^2 .
Explain what type of electromagnetic radiation would an electron in a hydrogen atom emit as it returns from an infinity excited state to the ground state
If acetic acid has a pure vapor pressure of 20 torr at 30 degrees C and acetaldehye has a pure vapor pressure of 1000 torr at 30 degrees C, a mixture of 12 moles of acetic acid
The number of different constitutional isomers that can be drawn for C2H4Br2 is equal to
Fears of radiation exposure from normal use of such detectors are largely unfounded. Identify reasons why ^241Am smoke detectors are perfectly safe.
describe three distinctly different reactions of furan which confirm the relatively smaller aromatic resonance stabilization of furan compared with thiophene and pyrrole (reactions which lead to non aromatic products)
A flask contains 300mL of 0.12M phosphate buffer that has a pH of 7.2. What volume of 0.2M HCl should be added to drop the pH to 6.7
An expandable balloon contains 1400L of He at 0.950atm pressure and 18degreesC. At an altitude of 22 miles (temperature 2.0degreesC and pressure 4.0torr), what will be the volume of the balloon
Provide the mechanism (showing all steps and curved arrows) for the dehydration of 4-methylcyclohexanol in the presence of sulfuric acid.
the Center of Science and Industry (COSI) and saw and exhibit called shadow pictures. It is where you stand in front of this "screen-like board"
One hundred fifty kmol of an aqueous phosphoric acid solution contains 5.00 mole % H3PO4. The solution is concentrated by adding pure phosphoric acid at a rate of 20.0 L/min
EDTA is utilized to slow microbial degradation of mayonnaise by preventing bacterial uptake of iron. Assuming that mayonnaise has a pH of 3.9 and a total iron content of 10-6 mole/liter, how much EDTA must be added to complex 99% of the total Fe
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