Cuantas moleculas de agua se producen al hacer reaccionar 750g de acido nitrico con el h-sodio​

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

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

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