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15,08 · 1023 atomi di rame corrispondono a 2,5 mol e 0,038 g di rame.
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3 mol di acido carbonico h2co3 corrispondono a 186 g.
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in 46 g di na, sono contenute 3,6 · 1023 molecole di solfuro di sodio.
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Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Why is retrograde motion an apparent motion

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.