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A 350.0 gram sample of copper is initially at 25.0 °C. It absorbs 12.50 kJ of heat from its surroundings. What is its final temperature, to the nearest tenth of a degree?
What is the molarity of a solution prepared by adding 29.3 g of HNO3 to enough water to make 2 L of solution
Calculate [H+] and the pH of the following solutions
Why are acid chlorides more reactive towards nucleophilic substitution than ethyl esters? Give an explanation of why acid chlorides are more reactive toward nucleophilic substition than are the corresponding ethyl esters.
A solution was prepared by dissolving 28.0g of KCl in 225g of water. Calculate the mass percent of KCl in the solution.
Understanding of Chemistry basics - explain a situation that violates the second law of thermodynamics?
The Clean Air Act mandates that certain metropolitan areas must add oxygenates to the gasoline that is sold in that area. What is the reason that oxygenates are added to gasoline?
explain why nitration occurs more rapidly in a mixture of concentrated nitric and sulfuric acids than in concentrated nitric acid alone
A 100.0-mL buffer solution is 0.175M in HCIO and 0.150M in NaCIO .What is the pH after addition of 150.0mL of HBr?
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
2.00 moles of a gas occupies 62.2 L at a particular temperature and pressure. Its density is 0.900 g/L. The standard molar volume is 22.4 L/mole. What is the molar mass.
At 1000 deg. K, a sample of pure NO2 gas decomposes. 2NO2(g)f/r2NO(g) + O2(g) The equilibrium constant Kp is 158. analysis shows that the partial pressure of O2 is 0.14 atm at equilibrium.
Estimate the value of the equilibrium constant at 610K for each of the following reactions. Delta Hf and S for BrCl is 14.6 kj/mol and 240.0 J/mol*K , respectively. Br2(g)+ Cl2(g) --> 2BrCl(g)
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