+ \(M_{CO_2}=12+16.2=44\left(\dfrac{g}{mol}\right)\)

\(n_{CO_2}=\dfrac{m}{M}=\dfrac{11}{44}=0,25mol\)

+ \(n_{H_2}=\dfrac{9.10^{23}}{6.10^{23}}=1,5mol\)

\(V_{H_2\left(đktc\right)}=n.22,4=1,5.22,4=33,6\left(l\right)\)

Câu 2

\(n_{O_2}=\dfrac{V_{O_2\left(đktc\right)}}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

Số phân tử oxi \(=\)\(0,3.6.10^{23}=1,8.10^{23}\)

\(M_{O_2}=16.2=32\left(\dfrac{g}{mol}\right)\)

\(m_{O_2}=n.M=0,3.32=9,6g\)

\(n_{H_2S}=\dfrac{26,88}{22,4}=1,2\left(mol\right)\\ V_{CO_2}=1,5.22,4=33,6\left(l\right)\)

Đáp án: b

Giải thích:

Ta có: \(n_{CO_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

Bạn tham khảo nhé!

b nha

a) 

\(n_{SO_2}=\dfrac{m}{M}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ n_{CO_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

b) 

\(n_{Cl_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\Rightarrow m_{Cl_2}=n.M=0,06.71=4,26\left(mol\right)\\ n_{Na_2CO_3}=n.M=0,5.106=53\left(g\right)\)

c) 

\(V_{N_2\left(\text{đ}ktc\right)}=n.22,4=0,25.22,4=5,6\left(l\right)\\ n_{O_2}=\dfrac{m}{M}=\dfrac{4,8}{32}=0,15\left(mol\right)\Rightarrow V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,15.22,4=3,36\left(l\right)\)

\(a.\)

\(m_{CuO}=2\cdot40=80\left(g\right)\)

\(b.\)

\(n_{CO_2}=\dfrac{8.96}{22,4}=0.4\left(mol\right)\)

\(c.\)

\(n_{CH_4}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}=0.2\left(mol\right)\)

\(V_{CH_4}=0.2\cdot22.4=4.48\left(l\right)\)

a) \(n_{CuO}=\dfrac{4}{80}=0,05\left(mol\right)\)

b) \(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)

c) \(M_A=1,172.29=34\left(g/mol\right)\)

\(n_A=\dfrac{33,6}{22,4}=1,5\left(mol\right)\)

=> m_A = 1,5.34 = 51(g)

\(a.n_{CO_2}=\dfrac{V}{22,4}=\dfrac{5.6}{22,4}=0,25\left(mol\right)\\ \Rightarrow m_{CO_2}=n.M=0,25.44\)

b. Số phân tử là: \(0,25.6.10^{23}=15.10^{22}\) (phân tử)

a,khối lượng mol của CO₂ là 11 gam 

b,số phân tử của CO₂ là 1,5.10²³

a,

\(nCO_2=5,6:22,4=0,25mol\\ mCO_2=0,25.44=11g\)

b,

số phtu CO2 là:

\(0,25.6.10^{23}=1,5.10^{23}\)

a.\(m_{CO_2}=\dfrac{4,48}{22,4}.44=8,8g\)

b.\(n_{CH_4}=\dfrac{2,8}{22,4}=0,125mol\)

c.\(V_{Cl_2}=0,25.22,4=5,6l\)

a) nCo2= V/22,4= 4,48/22,4= 0,2(mol)                                                                   mCo2= n.M= 0,2.44=8.8(g)                                                                       b) nCH4= V/22,4= 2,8/22,4=0,125(mol)                                                           c) VCl2=n.22,4= 0,25.22,4=5,6(l)

1.

\(a,n_{Al}=\dfrac{5,4}{27}=0,2(mol)\\ n_{CuO}=\dfrac{8}{80}=0,1(mol)\\ n_{Fe_2O_3}=\dfrac{16}{160}=0,1(mol)\\ b,V_{CO_2}=0,25.22,4=5,6(l)\\ V_{H_2}=0,175.22,4=3,92(l)\\ V_{N_2}=1,5.22,4=33,6(l)\)

2.

\(a,n_{Al}=0,5.2=1(mol);n_{O}=0,5.3=1,5(mol)\\ \Rightarrow m_{Al}=1.27=27(g);m_{O}=1,5.16=24(g)\\ b,n_{CO_2}=\dfrac{2,2}{44}=0,05(mol)\\ \Rightarrow m_C=0,05.12=0,6(g);m_O=0,05.2.16=1,6(g)\)