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Many cigarette lighters contain liquid butane, {rm C_4H_{10}} (l)Using enthalpies of formation, calculate the quantity of heat produced when 3.80 g of butane is completely combusted in air under standard conditions.
After workup and purification, a student obtains 1.1214 g of banana oil (isopentyl acetate). What is the percent yield for this reaction? Report your value to one decimal place (xx.x%)
Calculate the standard enthalpy of formation of liquid water (H2O) using the following thermochemical information: 2 C(s) + H2(g) C2H2(g) H = +226.8 kJ CO2(g) C(s) + O2(g) H = +393.5 kJ 2 C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l) H = -2599.3 kJ H = kJ
Use values of Ksp for Zn(OH)2 and Kf for Zn(OH)4-2 (page 330) to predict if a precipitate will form when you prepare a solution which contains 0.010 M Zn2+ and 1.0 M NaOH.
The following equilibrium pressures were observed at a certain temperature for the reaction. N2(g) + 3 H2(g) 2 NH3(g) PNH3 = 3.1 10-2 atm PN2 = 8.5 10-1 atm PH2 = 3.1 10-3 atm a)Calculate the value for the equilibrium constant Kp at this temperatu..
How many atoms of neon occupy a volume of 14.3 L at STP?
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC? Give your answer accurate to two decimal places.
The molal freezing point constant for water is 1.86 C/m. At what temperature will a mixture of 2.00 g of CaCl2(MM: 110.98g/mol) and 25.00 g of water freeze
A piece of copper alloy with a mass of 60.0 g is heated from 21.0 ?C to 44.0?C. In the process, it absorbs 507 J of energy as heat. What is the speci?c heat of this copper alloy.
2 hcl aq mgs lt--gt mgcl2 aq h2 g heat. when the temperature is increased in the system referenced above the
45 mL of 0.016 M NaOH are added to 37 mL of 0.035 M HCL. The acid and base react to form NaCl and water. Assuming that the total volume of the mixed solution is 82 mL, compute the molarity of the final HCL solution.
The resulting equilibrium solution has a pH of 10.21. What is the Ksp of the salt at 22 °C?
A titration was performed to standardize an EDTA solution. use the following data to calculate the molarity of the EDTA solution. A 50.00 mL aliquot of a standard solution containing 0.025000 M Ca^2+ required 39.92 mL of EDTA to reach a distinct b..
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