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(a) The P4,P4,O6,and P4O10 molecules have a common structural feature of four P atoms arranged in a tetrahedron (Figures). Does this mean that the bonding between the P atoms is the same in all these cases? Explain.
(b) Sodium trimetaphosphate (Na3P3O9) and sodium tetrametaphosphate (Na4P4O12) are used as water-softening agents. They contain cyclic P3O93- and P4O124- ions, respectively. Propose reasonable structures for these ions.
Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom. Molecular oxygen binds irreversibly to the Fe(II) atom in heme.
compute the volume of sodium hydroxide that is required to make a buffer with a pH = 5.77.? given that pKa = 4.77. and initial volume of the acid solution = 1.00 Litre.
Calculate the sulfide ion concentration in a saturated solution of hydrogen sulfide with a pH of 0.85. Assume that [H2S]=0.10 mol/L in a saturated solution. Write the overall, balanced net ionic equation for the ionization of hydrogen sulfide and ..
State reacting showing how nylon can be synthesized thus that it will react with (a) basic dyes and (b) acidic dyes.
A buffer solution is prepared by dissolving 0.200 mol of NaH2PO4 and 0.100 mol of NaOH in enough water to make 1.00 L of solution. What is the pH of the H2PO4- / HPO42- buffer if the Ka2 = 6.2 * 10^-8 A) 7.71
The half-life of Co-60 is 5.27 years. How long will it take for the radioactivity of a sample of cobalt-60 to diminish to 3% of its initial value
Oxygen difluoride, OF2, is a colorless, poisonous gas that reacts rapidly with water vapor to produce O2, HF, and heat. OF2(g) + H2O(g) --> 2HF(g) + O2(g) + 324.4 kJ
Explain the following observations. Use diagrams where possible and/or necessary, to aid your explanations:
Question- Part 1) Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Part b) Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added..
Determine which is the limiting reagent and how many grams of excess reagent remain unreacted. Calculate the theoretical yield of the reaction
Does the amount of precipitate in each tube signify that all the acid impurity has been removed from the ether layer containing the unknown neutral compound
The air in a laboratory was measured with a barometer to be 7.40 x 102 mm Hg. What is the laboratory air pressure in atm?
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