a) 1atom..................1e⁻ de valenta Ag 6.023*10²³................x x=6.023*10²³*1/1 x=6.023*10²³ e⁻ de valenta Ag b) 1mol.......................7g Li y moli..........................1.4g Li y=1.4*1/7 y=0.2moli Li 1mol................................6.023*10²³ atomi Li 0.2moli.............................z z=0.2*6.023*10²³/1 z=1.2046 atomi Li 1atom.......................1e⁻ de valenta Li 1.2046 atomi...............w w=1.2046*1/1 w=1.2046 e⁻ de valenta Li c) 0.3kmoli=300moli 1mol..............................6.023*10²³ atomi Al 300moli...........................a a=300*6.023*10²³/1 a=1806.9 atomi Al 1atom...........................3e⁻ de valenta 1806.9atomi...................b b=1806.9*3/1 b=5420.7 e⁻ de valenta