Which of the following gases will have the slowest rate of effusion?

water vapor (m = 18 g/mol)
oxygen gas (m = 32 g/mol)
hydrogen gas (m = 2.0 g/mol)
carbon dioxide (m = 44 g/mol)

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Is a pencil falling to the floor anon contact force, a force, or a contact force

Connect the whole numbers on the periodic table to indicate what they represent?