Which of the following cations has the SMALLEST radius?

60. In a swimming pool, eye irritation can result if the pH of the pool water rises above 7.7. One reported study found the average pH of human tears to be 7.50. What is the difference in hydronium ion concentration (in mol/L) between the normal pH of tears and a pH of 7.7?

59. Death results if blood pH reaches 6.8. Assuming blood behaves like water, would death result if the blood hydronium ion concentration were 8.35 × 10⁻⁷ M?

58. During the Apollo 13 mission, rising carbon dioxide levels in the spacecraft threatened the astronauts. Blood pH is normally held at 7.4 by this set of COUPLED equilibria: CO₂(g, air) ⇌ CO₂(g, blood)CO₂(g, blood) + H₂O ⇌ H₂CO₃(aq)H₂CO₃(aq) + H₂O ⇌ H₃O⁺(aq) + HCO₃⁻(aq) If the CO₂(g) level in the air supply increased, how would blood pH be affected?

How many electrons are required to reduce a SINGLE Cr atom in dichromate (Cr₂O₇²⁻) to chromium(III)?

36. If the total pressure in a closed vessel (5 L total volume) is 8 atm, which expression represents the number of moles of gas in the vessel at 25 °C?

Rank the following bonds and intermolecular forces in order of INCREASING strength (weakest first and strongest last): covalent bond, London dispersion forces, dipole-dipole forces, and hydrogen bonds

Which of the following elements has the LARGEST atomic radius?

The number of UNPAIRED electrons in the ground state electron configuration of a carbon atom is

The most favored Lewis structure of N₂O has how many lone pair(s) of electrons around the oxygen?