Question

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Answer 1

Bài 1:

Trong 1 mol B: \(\begin{cases} n_{Na}=\dfrac{106.43,4\%}{23}=2(mol)\\ n_C=\dfrac{106.11,3\%}{12}=1(mol)\\ n_O=\dfrac{106.45,3\%}{16}=3(mol) \end{cases}\)

\(\Rightarrow CTHH_B:Na_2CO_3\)

Câu 2:

\(a,4K+O_2\xrightarrow{t^o}2K_2O\\ 4:1:2\\ b,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ 2:3:2\\ c,2Al+6HCl\to 2AlCl_3+3H_2\\ 2:6:2:3\\ d,Na_2O+H_2O\to 2NaOH\\ 1:1:2\\ \)

\(e,2KClO_3\xrightarrow{t^o}2KCl+3O_2\\ 2:2:3\\ f,Zn+2HCl\to ZnCl_2+H_2\\ 1:2:1:1\\ g,2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ 2:1:3\\ h,P_2O_5+3H_2O\to 2H_3PO_4\\ 1:3:2\)