At 25°C, the standard enthalpy of combustion of gaseous propane (C3H8) is –2219.0 kJ per mole of propane, and the standard enthalpy of combustion of gaseous propylene (C3H6) is –2058.3 kJ per mole of propylene. What is the standard enthalpy change for the following reaction at 25°C? C3H6(g) + H2(g) → C3H8(g) Substance ∆H°f (kJ/mol) CO2(g) –393.5 H2O(l) –285.8 a) +160.7 kJ b) –160.7 kJ c) +104.7 kJ d) –20.4 kJ e) –125.1 kJ

A 3.452 M solution of triethylamine ((C2H5)3N, Kb= 4e-4) has a pH of 12.57. What is the percent ionization of this solution?

If there is appeoximately 84,000 people living in Nampa, Idaho and there is an average of 4 people per household and that each household owns 2 cars, how much total carbon dioxide is generated (@ STP) by the residents of the city of Nmmpa each year with the following information:

(A) Each car has a 16 gallon gasoline tank

(B) Each car in each household consumes one tank ofgasoline per week (52 weeks per year)

(C) Assume that gasoline is pure benzene (C6H6) and is burned to completion in air when the tank is emptied

Q: Approx. hoow much total Liiters of CARBON DIOXIDE GAS is generated by the residents of Nampa, Idaho only driving their cars and consuming one tankful per week of gasoline in each car for each of the 52 weeks in the year?

Write the balanced molecular and net ionic equations for the reaction between solid copper and nitric acid (6M) concentration. Identify the oxidation and reduction half-reactions. How would this change if the concetration was15.8M?

Balanced molecular equation:

Ionic Equation:

Net ionic equation:

Oxidation half-reaction:

Reduction half-reaction:

Mg(s)+2HCl(aq)=MgCl2(aq)+H2(g)

(A) 0.0675g Mg AND 4mL of 6M HCl were used. Barometric pressure were 28.85 inches Hg. A volume of 73.6mL of hydrogen was collected at a temperature of 26.0C. The vapor pressure of water is 25.2mm Hg at this temperature. Calculate R, the gas law constant, in L-atom\mol-K using the information above for the reaction of HCl and Mg. 760 mmHg= 1.00atm. 1 inch=2.54 cm.

Show your calculation

(B) why is it necessary to substract the vapor pressure of the hydrogen gas formed to your experiment?

(C) If some gas was lost during the process and the measured amount of gas was less than the amount that should have been produced, would this increase or decrease the calculated R ? Explain your answer.

Data Table 1. Adding 0.1M HCl from D1 into A1.

Data Table 2. Adding 0.1M NaOH from D6 into A6.

Data Table 3. Adding 6M HCl from Pipet into B1.

Data Table 4. Adding 6M NaOH from Pipet into B6.

Data Table 5. Adding 0.1M HCl from D1 into C1.

Data Table 6. Adding 0.1M NaOH from D6 into C6.

Questions

(5pts) Discuss if you saw a buffer. Define buffer and explain, with complete sentences, what you did to shift that buffer.

(10pts) A buffer was established with 2.0mL of 0.833M acetic acid. 0.5mL of 0.1M HCl is added. What is the new pH of the buffer? Ka of acetic acid = 1.8 x 10^-5 Show your work.

Discuss in a complete sentence how your theoretical calculation here is the same or different than what was obtained in Data Table 5.

A gas mixture containing water vapor has a dry basis molar composition of 8.5% CO, 10.5% CO2,0.5% O2 and 80.5% N2. The gas s at 620c and 1 atm with a dewpoint of 57c at a flow rate of 1270mol/h.The gas is cooled to 425C by spraying water at 20C into the gas.Assume that the spray unit is adiabatic .calculat the required water feed rate in kg /h.

Menthanol, CH3OH, formally know as wood alcohol is manufacutred commercially by the following reaction: CO (g) + 2H2 (g) --> CH3OH (g) a 1.5000 -L vessel was filled with 0.1500 mol CO and 0.3000 mol H2. When this mixture came to equlilbrium at 500K, the vessel contained 0.1187 mol CO. How many coles of each substance were in the vessel?

Part 2. Obtain the vaule of Kc for the following reaction at 500K

CO (g) + 2H2 (g) --> CH3OH (g) Use the data calculated above.

please show work. thanks

REDOX REACTION:

C₆H₁₂O₆ + 6O₂ ---> 6CO₂ + 6H₂O + Energy

-Could you tell me which compound is oxidized and which compound is reduced and why? I would really appreciate if you drew it out step-by-step and showed the calculations for each oxidation number.

1. For each of the following circumstances, indicate wheter the calculated molarity of NaoH would be lower, higher, or unaffected. Explain your answer in each case.

a. The inside of the pipet used to transfer the standard HCl solution was wet with water.
b. You added 40 mL of water to the titration flask rather than 25 mL.
c. The buret, wet with water, was not rinsed with NaOH solution before filling the buret with NaOH with solution.
d. Five (5) drops of phenolphthalein were added to the solution to be titrated rather than three (3) drops.

In our chem lab, we were testing for an unknown equilibrium "k" value using the absorbency rates of various concentrations, how am i supposed to find the k value if none of our samples ever reached equilibrium. Our prof said to calculate the absorbency of each sample, but all the values are obviously different.

If anyone can show me how these are solved I would appreciate it, answers included though please.

16.) Which of the follow conatin the GREATEST number of MOLES of OXYGEN. Show your work.

0.50 mol P4010, 1.5mol P2O5, 2.5mol CO2, 2.0mol N2O4   

20.) Ibuprofen has a chemical formula C13H1802. When the equation is properly balanced what is a correct mole ratio of CO2 to H2O in the reaction?

21.) 4Al(s) + 3O2(g) ---> 2 Al2O3 (s) If 10.0 mol of aluminum is converted to Al oxide, how many moles of Al2O3 are produced?

23.) What MASS of NaOH is need to make 450mL of a 2.0 M solution. SHOW your work.

Explain how a molecule can have polar bonds but have no molecular polarity. Name the compounds that have bond polarity but no molecular polarity ( out of CH4, CF4, NH3, NF3, H2O, OF2, CO2, CH2F2).

Determine the pH of (a) 0.20 M sulfuric acid (b) 0.20 M hydrochloric acid, (c) 0.20 M sodium hydroxide, (d) 0.20 M acetic acid, and (e) 0.20 M solution of NH₃ at 25 ^oC.