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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
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places
If 4.00 grams of NaOH is added to 1.00 L of the solution in #1 (assume no volume change), what is the pH of the resulting solution
Write a balanced reaction for the complete combustion of ethanol (C2H5OH) in oxygen, using the smallest integer coefficients. Then add up the total of all of the coefficients from both sides of your equation and enter that number as your answer.
A 40.0 mg sample of a protein is dissolved in water to make 25.0 mL of solution. The osmotic pressure of the solution is 0.56 torr at 25°C. What is the molar mass of the protein?
In which of the compounds CH4, NH3,H2O, SiH4, or H2S does hydrogen bear a partial negative charge
Then 10.00ml of this solution is diluted further to 100ml. What is the molarity of this last solution?
When aluminum metal is dipped in an aqueous solution of hydrochloric acid, hydrogen gas is produced with the formation of an aluminum chloride solution. Write the balanced chemical equation showing the phase of reactants and products.
Show the terminal alkyne and alkyl halide from which the following products can be obtained. If two routes look freasible, list both
How many grams of FeSO4.(NH4)2SO4.6H2O (MW = 392.14) must be dissolved and diluted to 250.0 mL to prepare an aqueous solution that is 10.00 ppm Fe2+
Which of the following reaction sequences can be used to prepare m-chloroaniline starting from benzene
Methane the principal component of natural gas is used is used for heating and cooking. The combustion process is CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l). If 12.1 moles of CH4 react with oxygen, what is the volume of CO2 (in liters) produced at 21.5 d..
Formation of SO3 from the air pollutant SO2 is a key step in the formation of acid rain, according to the following reaction. Use standard enthalpies of formation from Appendix L to calculate the enthalpy change for the reaction.
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