Đáp án:

VO2=22,4 (l); VCO2=11,2 (l)��2=22,4 (�); ���2=11,2 (�)

Giải thích các bước giải:

Ta có:

a,PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

Ta có: \(n_{CH_4}=\dfrac{3,2}{16}=0,2\left(mol\right)\)

Theo PT: \(n_{O_2}=2n_{CH_4}=0,4\left(mol\right)\)

\(\Rightarrow V_{O_2}0,4.22,4=8,96\left(l\right)\)

b, Theo PT: \(n_{CO_2}=n_{CH_4}=0,2\left(mol\right)\)

PT: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)

Theo PT: \(n_{CaCO_3}=n_{CO_2}=0,2\left(mol\right)\)

\(\Rightarrow m_{\downarrow}=m_{CaCO_3}=0,2.100=20\left(g\right)\)

Bạn tham khảo nhé!

\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\\ a,n_{O_2}=3.0,5=1,5\left(mol\right)\\ V_{O_2\left(đktc\right)}=1,5.22,4=33,6\left(l\right)\\ V_{kk\left(đktc\right)}=33,6.5=168\left(l\right)\\ b,n_{CO_2}=n_{H_2O}=2.0,5=1\left(mol\right)\\ m_{CO_2}=44.1=44\left(g\right);m_{H_2O}=18.1=18\left(g\right)\\ c,CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\\ n_{Ca\left(OH\right)_2}=n_{CO_2}=1\left(mol\right)\\ m_{Ca\left(OH\right)_2}=1.74=74\left(g\right)\\ m_{ddCa\left(OH\right)_2}=\dfrac{74.100}{10}=740\left(g\right)\)

a) PTHH: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

b+c)

Vì trong chất khí, tỉ lệ số mol cũng chính là tỉ lệ về thể tích 

\(\Rightarrow\left\{{}\begin{matrix}V_{CO_2}=V_{CH_4}=11,2\left(l\right)\\V_{O_2}=2V_{CH_4}=22,4\left(l\right)\end{matrix}\right.\)

a)2H₂ + O₂ --t^o--> 2H₂O

b) \(n_{H_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)

PTHH: 2H₂ + O₂ --t^o--> 2H₂O

            0,5-->0,25------>0,5

=> \(m_{H_2O}=0,5.18=9\left(g\right)\)

c) V_O2 = 0,25.22,4 = 5,6 (l)

=> V_kk = 5,6 : 20% = 28 (l)

a) \(n_{CH_4}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

PTHH: \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\)

b) Theo PTHH: \(n_{H_2O}=n_{O_2}=2n_{CH_4}=2.0,4=0,8\left(mol\right)\)

\(m_{H_2O}=n.M=0,8.18=14,4\left(g\right)\)

c) \(V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,8.22,4=17,92\left(l\right)\)

\(n_{CaCO_3}=\dfrac{25}{100}=0.25\left(mol\right)\)

\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)

\(0.25...........0.25...........0.25\)

\(C_{M_{Ca\left(OH\right)_2}}=\dfrac{0.25}{0.1}=2.5\left(M\right)\)

\(CH_4+2O_2\underrightarrow{t^0}CO_2+2H_2O\)

\(0.25..............0.25\)

\(V_{CH_4}=0.25\cdot22.4=5.6\left(l\right)\)

a) nCaCO3=0,25(mol)

CH4 + 2 O2 -to-> CO2 + 2 H2O

0,25<------------------0,25(mol)

CO2 + Ca(OH)2 -> CaCO3 + H2O

0,25<------0,25-----------0,25(mol)

b) CMddCa(OH)2= 0,25/0,1= 2,5(M)

b) V(CH4,đktc)=0,25.22,4=5,6(l)