Calculate the solubility of barium carbonate, BaCO3, in pure water. Ksp = 2.0 × 10–9

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Why are people not able to skip a dive to the deepest part of the ocean

The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?