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Pentane (C5H12) reacts with oxygen (02) to produce carbon dioxide and water. The reaction is very exothermic, with delta H = -353\ kj/mol. calculate ( with work shown) the heat of formation of pentane
The reaction between sodium metal and chlorine gas is highly exothermic and produce NaCl. Comment on this observation relative to the calculated enthalpy for the aforementioned gas-phase reaction.
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
energy to heat a certain sample of pure silver from 12.0 C to 18.2 C. Calculate the mass of the sample of silver.
What is a variable which has no effect on the rate of a chemical reaction under any circumstance is
A certain weak acid, HA, is titrated with Ka 5.61x10^-6 naoh. More strong base is added until the equivalence point is reached. What is the pH of this solution at the equivalence point if the total volume is 56.0
What is the strongest attractive force that must be overcome in order to do the following: a) melt pure solid phosphorus pentachloride b) boil pure liquid selenium tetrafluoride
In titration experiment, 21.4 mL of 0.987 mol/L formic acid is required to neutralize 17.4 mL of Barium hydroxide. The concentration of the Barium hydroxide solution is
An 85.0g sample of iron requires 954 J of heat to raise its temperature 25.0C. What is the specific heat of the iron?
If a sample containing 2.00 mL of nitroglycerin ({rm{density}} = 1.592{rm{g/mL}}) is detonated, how many total moles of gas are produced?
Calculate the theoretical amount of oxygen based on your starting mass of reactant. Then calculate the percent yield when you compare your actual yield to this theoretical yield.
Draw the resonance form of dimethylaniline that is most prone to react with diazotized sulfanic acid.
How can ethidium ions cause mutations in DNA and what type of interactions exists between the DNA and ethidium ions?
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