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Ex:1 Cati moli reprezinta: a)800 g calciu
B)72 g carbon
C)112 g fier
D)4,2 g magneziu
Repedeeeee!!!!


Răspuns :

[tex]a)A_{Ca}=40g/mol[/tex]

[tex]n_1=\frac{m_{Ca}}{A_{Ca}}=20 \ moli[/tex]

[tex]b)A_C=12g/mol[/tex]

[tex]n_2=\frac{m_C}{A_C}=6 \ moli[/tex]

[tex]c)A_{Fe}=56g/mol[/tex]

[tex]n_3=\frac{m_{Fe}}{A_{Fe}}=2 \ moli[/tex]

[tex]d)A_{Mg}=24g/mol[/tex]

[tex]n_4=\frac{m_{Mg}}{A_{Mg}}=0,175 \ moli[/tex]