Which statement best describes the conservation of energy? 1.Energy is lost when a match burns.
2.energy is produced when a green plant grows
3.gasoline creates energy in an engine
4.a toaster changed electricity to heat energy

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process

What volume would 2.25 moles of ne has occupy at stp?