[hoá 10]hoa nang cao

L

linh19961996

Last edited by a moderator:
P

pety_ngu

[TEX]p_a - p_b =8[/TEX](A>B)
[TEX]p_a+P_b=32[/TEX]
\Rightarrow[TEX]p_a=20[/TEX](Ca)
[TEX]p_b=12[/TEX](Mg)
 
Top Bottom