Câu 1 :
a,
\(K+O_2\underrightarrow{^{to}}K_2O\)
\(2Ca+O_2\underrightarrow{^{to}}2CaO\)
\(3Fe+2O_2\underrightarrow{^{to}}Fe_3O_4\)
\(C+O_2\underrightarrow{^{to}}CO_2\)
\(S+O_2\underrightarrow{^{to}}SO_2\)
b,
\(CH_4+2O_2\underrightarrow{^{to}}CO_2+2H_2O\)
\(C_2H_4+3O_2\underrightarrow{^{to}}2CO_2+2H_2O\)
\(C_2H_2+\frac{5}{2}O_2\underrightarrow{^{to}}2CO_2+H_2O\)
\(2CO+O_2\underrightarrow{^{to}}2CO_2\)
Câu 2 :
\(S+Zn\underrightarrow{^{to}}ZnS\)
\(3S+2Al\underrightarrow{^{to}}Al_2S_3\)
\(S+Mg\underrightarrow{^{to}}MgS\)
\(S+Cu\underrightarrow{^{to}}CuS\)
\(S+Fe\underrightarrow{^{to}}FeS\)
Bài 1 :
\(d_{A/H2}=17\Leftrightarrow M_A=17.2=34\left(\frac{g}{mol}\right)\)
\(d_{A/kk}=0,55\Leftrightarrow M_A=0,55.29=15,95\left(\frac{g}{mol}\right)\)
\(d_{A/H2S}=0,425\Leftrightarrow M_A==0,425.34=14,45\left(\frac{g}{mol}\right)\)
Bài 2:
\(S+Zn\underrightarrow{^{to}}ZnS\)
\(3S+2Al\rightarrow Al_2S_3\)
\(S+Mg\underrightarrow{^{to}}MgS\)
\(S+Cu\underrightarrow{^{to}}CuS\)
\(S+Fe\underrightarrow{^{to}}FeS\)
