physical-chemistry

  1. General equation for gas chromatography
  2. how does hydrogen spectrum emission work?
  3. Dependence of Van der Waal's constants with distance

  4. Half time, first order reaction

  5. Does a gold detector exist?
  6. What is the meaning of "equivalent weight" and its formula?

  7. In rovibrational spectra, when exactly is the Q branch forbidden?
  8. Can an atom have more than 8 valence electrons? If not, why is 8 the limit?

  9. Is the energy inserted by electron is equal to the change in energy after transition ie ∆E
  10. Constants of solid catalysis basic mechanism
  11. application and importance of EIS and Nyquist plots in MIC
  12. how elements can’t be divided into its smallest pieces?

  13. Can the friction of air disintegrate objects if they are accelerated enough?

  14. Half life of first order reaction
  15. Are there more positive azeotropes than negative azeotropes?
  16. Conservation of angular momentum in rotational spectroscopy
  17. How do I solve this Ionic Equilibrium problem?

  18. Is this a viable method for graphene production?

  19. What are the factors that affect the redox reactions?
  20. Why enthalpy change of reaction does not affect the rate of reaction?

  21. Why does vibrational cooling occur much faster than sponteneous emission in the condensed phase?
  22. How to calculate the enthalpy change from the reaction of silver nitrate and sodium iodide?
  23. Rotovibrational selection rules for symmetric tops

  24. How can I measure pCO2 using a pCO2 electrode?

  25. Interpreting from phase diagram whether O2 will float or sink
  26. How can the concentration of a solid be constant during a reaction?
  27. Charge-transfer absorption complex - solvent sensitivity

  28. Ellingham Diagram
  29. How to calculate concentration from reaction quotient and initial concentration?

  30. Properties of gases...Collision number... collision frequency...collision diamter...mean free path

  31. Entropy at zero kelvin for pure atom crystal

  32. Effect of temperature and pressure on .collision diamter
  33. What is the entropy of mixing of two ideal gases starting out with different pressures and diffrent tempeature?

  34. A mole of atoms is the number of atoms whose total weight equals the atomic weight?

  35. Finding electron configuration of lanthanide ions

  36. Determining the reaction time of water synthesis by use of differential equations
  37. Ladder operator
  38. Water cooling by evaporation

  39. Which substance has the fastest rate of evaporation at room temperature?

  40. Heat of formation of silver(I) chloride
  41. Has IUPAC been inaccurate in their 1994 definition of kinetic stationary state?
  42. Real gas not to behave ideal
  43. Why can't salt water and fresh water mix?

  44. Why does copper form bubbles in vinegar in this situation?

  45. How to determine the total pressure of a gaseous mixture of xenon tetrafluoride and hydrogen?
  46. The coldest (the most endothermic) reaction

  47. Why is absolute zero unattainable?
  48. Why is there no neutron in protium?
  49. Will nitrate be able to oxidise mercury?
  50. Law of Mass action VS Rate law

  51. Do Electrons Really 'Spin'?

  52. Negative phases don;t exist for 1s orbital why?
  53. A drop of water in a tin of sugar: Which one's the solvent, the sugar or the water?

  54. "Nitrogen (gas) is physisorbed over iron (metal) at room temperature": Is this for real?

  55. POAC equation doubt
  56. Formulating via density for e-liquid solutions
  57. How do I calculate the height of an hcp lattice?

  58. Mass of oxygen in He+O2 mixture

  59. How do I find the final temperature using specific heat?
  60. Is there a difference between chemical energy and chemical potential energy?

  61. Is change of pH of water with respect to temperature linear?
  62. How do I calculate the molarity of a 40% w/v HCl solution?
  63. What is the mole fraction of dihydrogen in a mixture, given the relative rates of effusion of its components?

  64. Why does sunlight cause colors to fade?
  65. Difference between Enthalpy and Heat transferred in a reaction?

  66. Do I have to consider the molecular mass of the oxygen atom or the diatomic oxygen molecule when determining the empirical formula of an iron oxide?
  67. If something reacts with oxygen, when calculating the empirical formula, do you use O or O2?
  68. What is the relationship between something magnetic and unpaired electrons?

  69. How much energy water "captures" at it evaporates in room temperature?
  70. Flory–Schulz type distribution with stoichiometric imbalance
  71. Why is dinitrogen tetraoxide less stable at high temperature?

  72. Enthalpy calculation

  73. Degree of hydrolysis

  74. Unusual trends in ionisation enthalpy between titanium and vanadium?
  75. Vapour pressure in an enclosed container with liquid at normal conditions

  76. Notation for specific/volumetric entropy

  77. Given this liquid-liquid phase diagram, is the green line the nitrobenzene-rich phase?

  78. Energy level of the product in a cell reaction

  79. Why is activation energy temperature-independent?
  80. Does solubility matter when measuring density with displacement method?
  81. Do the Noble gases really have their outermost shell filled?

  82. What does the Gibbs standard free energy mean in chemistry?
  83. Dalton's law for a gas mixture

  84. Relationship between solubility and enthalpy of solution
  85. Mulliken Symbols in group theory

  86. Lever rule confusion

  87. Is there a similar characteristic of the lanthanide contraction in the other transition metal groups?

  88. Working with wave number equations, use trial-and-error?

  89. How can sodium chloride melt ice or keep it frozen?

  90. Designing a device to separate water from water-ethanol mixture using dry ice baths

  91. What does the peak separation of carbon dioxide IR rotational-vibrational spectrum corresponds to and why?
  92. Entropy and enthalpy at the melting point of benzene

  93. What is the differences between partial pressure and vapour pressure?

  94. How to Redefine Heat Capacity at constant volume of any gas

  95. If hydrogen bonds are chemical bonds, and these bonds are broken when water changes phases, why doesn't this classify as a "chemical" change?

  96. Why are fluorides of transition metals unstable in low oxidation states?

  97. Why there are just two Ramachandran angles in protein structure for two peptide bonds?

  98. Steric factors greater than 1 or less than 0?
  99. Entropy of the irreversible expansion of oxygen gas
  100. How is langmuir's adsorption isotherm different from Freundlich's