A certain diprotic acid H2X is a strong acid in its first deprotonation and a weak acid in its second deprotonation. A solution of H2X that is initially 0.020 M has a pH of 1.66. What is the value of Ka2for this acid

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium