How many oxygen elements are in 5 molecules of ibuprofen

What is binding energy and separation energy

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle