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The isomerization of methyl isocyanide, CH3NC -> CH3CN, follows first-order kinetics. The half-lives were found to be 161 min at 199 degrees celcius and 12.5 min at 230 degrees celcius. Calculate the activation energy for this reaction.
Find the pH of a 0.135 M aqueous solution of periodic acid (HIO4), for which
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestonerich soils. How many grams of Na2CO3 must she add to 1.5 L of freshly prepared 0.20 M NaHCO3 to make the buffer? KA of HCO3- is 4.7 x 10-1..
Consider the reaction CaCN2 + 3H2O ->CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
where its latent heat of vaporization is 20.4 kJ/mol. Its molar mass is 70.91 g/mol. (a) Calculate the internal energy change (deltaU) for vaporization of 100 g of Cl2(liq.)
A lime-soda softening plant treats a flow of 150 MGD, and the water has 86 mg/l CO2. The commercial grade of quicklime has a purity of 85% and the soda ash has a purity of 95%.
A sample of nitrogen gas is contained in a pistol with a freely moving cylinder. At 0.0 C , the volume of the gas is 375 ml. To what temperature must the gas be heated to occupy a volume of 500.0ml
Calculate the mass of glucose metabolized by a 54.8 person in climbing a mountain with an elevation gain of 1730
If 18.26 grams of sulfuric acid are reacted with a large amount of aluminum metal, what volume of hydrogen gas would be produced at STP?
Methylbenzene and 1,2-dimethylbenzene mix to form an ideal solution. At 90oC, the vapor pressure of pure methylbenzene is 400 Torr and that of pure 1,2-dimethylbenzene is 150 Torr.
Construct quantum mechanical operators for the following observable: (1) the inverse separation 1/x
an ideal gas originall at 0.85 atm and 65 degrees celcius was allowed to expand until its final volume pressure and temperature were 94 mL, 0.60 atm, and 47 degrees celcius respectivily. What was its inital volume?!
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