The quantum theory of energy levels within atoms was aided by: study of the sun's light spectrum
emission line spectra of various elements
alpha particles
gamma rays

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean