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Nicotine, a component of tobacco, is composed of C, H, and N. A 12.075 mg sample of nicotine was combusted, producing 32.757 mg of CO2 and 9.391 mg of H2O. What is the empirical formula for nicotine?
the partial pressure of o2 in air at sea level is 0.21 atm. using the data in table 13.2 together with henrys law
The value of E for the following reaction is 0.34 V. What will the cell potential be when the [Cu2+] =10 M and the [Cr3+]=1 M? 2Cr(s) + 3 Cd 2+ (aq) --> 2Cr3+ (aq) + 3Cd(s) a)0.31 b) 0.46 c) 0.4 d) 037 e)0.28
A solution of sodium chloride in water has a vapor pressure of 20.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
Identify the spectator ions present when the following are mixed. Include aggregation states. If there are no spectator ions, say none.
A 2-kg mass of an ideal gas expands at a constant pressure of 172 kPa in a piston-cylinder system from a temperature of 32oC to a final temperature of 182oC. Determine Q, W, DeltaU and DeltaH.
3.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 234 grams of water initially at 25.00 ?C. After the combustion,the temperature is 26.55 ?C.
A disinfectant states that it will kill 99.9% of bacteria if left on for 45 minutes. What percentage of bacteria are killed if the disinfectant is left on only for 5 minutes
Draw energy level diagram to show the low- and high spin octahedral complexes of the transition-metal ions that have the electron configurations d4 d5 d6 and d7
Assuming that the water is contaminated, devise a method for disposing of the contaminated water without contaminating the environment, but allowing the recycling plant to resume operations as soon as possible.
The infrared spectrum of CH3CH2NH2 shows two absorptions not shwon by bromoethane. Identify the bonds responsible for these two absorptions.
A urine sample was found to have a pH of 5.83. What would be the ratio of the unprotonated form, A, to the protonated form, HA, for uric acid in this urine sample?
Paper pulp produced by kraft/sulphate process is A. bleached easily B. dull white in color C. strong fibrous D. dark colored 2. Claude process of gas liquefaction employs A
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