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Question- 1a) With pertinent thermo data, show why N2O4 (g) cannot be made by direct combination of constituent elements at standard state conditions. LS analysis is also useful.
1b) Without calculation, explain why Delta H of formation (NO2 gas) is more endothermic than Delta H of formation (N2O4 gas)
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Calculate the pH after the addition of 0.0 mL, 2.0 mL, 4.0 mL, 6.25 mL, 10.0 mL, 12.0 mL, 12.25 mL, 12.5 mL, 13.0 mL, 14.0 mL, and 15.0 mL of the Ba(OH)2.
If a solution containing 54.368 mercury(II) perchlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed?
When a 41.7g sample of an unknown compound is dissolved in 500g of benzene, the freezing point of the resulting solution is 3.77oC. The freezing point of pure benzene is 5.48oC, and Kf for benzene is 5.12oC/m. Calculate the molar mass of the unkno..
Rate of reaction for 8H2S +4O2 -> 8H2O + S8, if started with 21.35g of H2S and 15.36g of O2. What is the limiting reactant and how much S8 can be produced.
In the occurrence of aqueous ammonia, cobalt(III) forms the complex ion Co(NH3)63+. Find out the molar concentration of free cobalt(III) ion in solution when .220 mole Co(NH3)63+ is dissolved in a liter of 2.50M aqueous ammonia.
In some industrial processes, sulfite is added to remove dissolved O2 to prevent corrosion of pipes. Write the balanced overall chemical reaction for reduction of dissolved O2 by sulfite (SO32-).
The protein in a 1.285-g sample of an oat cereal is determined by the Kjeldahl procedure for organic nitrogen. The sample is digested with H2SO4, the resulting solution made basic with NaOH
State a beaker contains 100. mL of 0.0640 M H2SO4. Define what volume of 0.0470 M KOH solution is needed to exactly neutralize the acid
We wish to lower the freezing point of the water in an automobile radiator to -40 C. The total mass of water present is 12.0kg. For which one for the following compounds would we have to use the greatest mass of solute to achieve this
in an experiment a piece of magnesium ribbon is burned in air in a crucible. the mass of the mixture of mgo and
during a titration the following data were collected. a 20 mlportion of an unknown monoprotic acid solution was
What is the relationship between the products formed when (R)-3-methyl-1-pentene is reacted with HBr? Question 15 options: Constitutional isomers Diastereomers Enantiomers Meso compound
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