Iridium has two naturally occurring isotopes. iridium-191 has a mass of 190.96 and a relative abundance of 37.3%. iridium-193 has a mass of 192.96 and a relative abundance of 62.7%. what is the weighted average atomic mass of iridium?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What happens when light is scattered?

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?