The standard half-cell potential for the reaction
O2(g)+4H+(aq)+4e−→2H2O(l) is +1.229 V at 298.15 K.
The aO2 = 1.00 assuming that the aH+ is equal to the molality.

Part A

Calculate E for a 0.100-molal solution of H2SO4 for aO2 = 1.00 assuming that the aH+ is equal to the molality.

Part B

Calculate E for a 0.100-molal solution of H2SO4 for aO2= 1.00 using the measured mean ionic activity coefficient for this concentration from the data tables in the textbook.

Part C

How large is the relative error if the concentrations, rather than the activities, are used?

A 24.7-g sample of white phosphorus was burned in excess of oxygen. The product was dissolved in enough water to make 549 mL of solution. Calculate the pH of the solution at 25 C

Hydrogen sulfide decomposes according to the following reaction,for which Kc = 9.30 multiplied by 10-8 at 700°C. 2 H2S(g) reverse reaction arrow 2H2(g) + S2(g) If 0.29 mol H2S is placed in a 3.0 L container, what is the equilibrium concentration of H2(g) at 700°C?

Why is the O-H and the N-H hydrogens not visible on the H NMR of p-aminophenol reactant and acetaminophen product?

3. C (s) + H2O (g) → CO (g) + H2 (g) Le Châtelier's principle predicts that increasing the volume of the reaction vessel will ________.

suggest an explanation following- The Cr and Ni content of stainless steels used to make knife blades is different from that used in the manufacture of spoons.

1. Sketch diagrams of a gas chromatograph and a high performance liquid chromatograph. Label all the parts and describe their use in one sentence each. Why is HPLC so important to modern industrial chemistry?

If i have 1,000,000 gallons of water at a pH of 4.45 how many pounds of NaOH are need to raise this water to a pH of 7.8?

Please show work.

Phosphoric acid, H3PO4(aq), is a triprotic acid. Calculate the pH and concentrations of H3O + (aq), H3PO4(aq), H2PO4 − (aq), HPO4 2− (aq), PO4 3− (aq), and OH− (aq) in a 0.100-M phosphoric acid solution at 25°C.

Ethylene oxide (C2H4O) is made by the catalytic reaction between ethylene (C2H4) and oxygen.Fresh ethylene, pure oxygen, and recycled ethylene are mixed to give a reactor feed gas containing 55%C2H4 which enters the reactor at 1 atm absolute and 300 oC. From test experiments, the single-pass conversion of ethylene in the reactor is 54% and, of this, 72% goes to ethylene oxide and the balance decomposes to CO2 and H2O. Most of the unreacted ethylene is separated from the reactor exit stream and is recycled, a pure ethylene oxide product stream is produced, and the remaining materials leave in a waste stream which analyses 9.0% ethylene. The production rate of ethylene oxide is 26,430 kg/day.Determine: a) the molar flow rate of fresh ethylene feed; b) the flow rate of the recycle stream; c) the fraction of feed oxygen wasted; and d) the percent excess oxygen

Using data from the table below, estimate the percentage of chlorocyclohexane molecules that have their substituents in an axial orientation at room temperature.

Table 4.1 - http://imgur.com/ZLsHz5S,9ose7I0

Figure 4.12 - http://imgur.com/ZLsHz5S,9ose7I0#1

Find the pH of a 0.170M HClO2(aq) solution. For HClO2, Ka=0.011.

Which of the following electronic transitions in a hydrogen atom will be accompanied by the absorption of electromagnetic radiation of the longest wavelength?

Group of answer choices

A. n = 3 → n = 4

B. n = 6 → n = 5

C. n = 3 → n = 2

D. n = 1 → n = 2

E. n = 4 → n = 5

Determine the pH of a solution that is 3.55% KOH by mass. Assume that the solution has density of 1.01 g/mL.