Sketch and explain why an elemental lamp gives a line spectrum rather than a rainbow.

If the root word engage means “to connect with something,” what does the word disengage mean in the following sentence? he disengaged the gears by stepping on the clutch pedal. a.added more engine powerb. activated a connection to the pedalc. stalled the engined. released a connection to the pedal

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure