20.0 grams of water decomposes into hydrogen gas and oxygen gas through electrolysis. If the percent yield is 80.0%, what mass of oxygen gas is produced?

Mass of oxygen gas produced : 14.08 g

Reaction

2H₂O(l)⇒2H₂(g)+O₂(g)

mol of H₂O (MW=18 g/mol) :

mol O₂ :

mass O₂ (theoretical) :

mass O₂ (actual) :

chemists can use the electron cloud model to assign electrons to different atomic orbitals. atomic orbitals also explain the patterns in the periodic table

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.