Is galena a common or rare mineral?

Why does chelation leads to increase in entropy even though it leads to ring formation? What cellular process caused this effect in the lettuce plants? How is the climate where cheetas stay? What is a change in concentration of a reactant or product over time? What is body sculpting? What is the most important thing on business cards in Germany? What forms When something is dissolved into a liquid? Why are cracking large hydrocarbon molecules more useful than the original large molecules? To learn about the temperature inside the earths crust scienists study? What city is located at 39 degrees n 116 degrees E? Decreasing heart rate is under the control of what nervous division? What is the availability of uranium? Can you extinguish a fire with sodium lauryl sulfate? Do brass floor lamps need to be polished often? What subatomic particle is removed or added to the amber? Is the Fraser riverdendritic or trellis drainage? How many mm in an inch exactly? What are the factors affecting the growth of plants and seeds? If we apply Newton's first law of motion to a ball being thrown in the vacuum of space with a force will the ball move infinitely? How is commensalism and tide pool equal?