P
phamthanhnhang
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
CH3-COOH => X => NH2-CH2-COOH :-SS
a) X la chat gi ???
b)viet ptpu hoa hoc.
Co ai biet lam ko vay ? @-)
a) X la chat gi ???
b)viet ptpu hoa hoc.
Co ai biet lam ko vay ? @-)