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\(a.n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\\ \Rightarrow m_{CO_2}=44.0,3=13,2\left(g\right)\\ n_{Cl_2}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\\ \Rightarrow m_{Cl_2}=71.0,06=4,26\left(g\right)\\ b.m_{Na_2O}=62.0,32=19,84\left(g\right)\\ m_{CaCO_3}=100.1,44=144\left(g\right)\)
a) \(n_{CO_2\left(đktc\right)}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(m_{CO_2}=0,3.44=13,2\left(g\right)\)
\(n_{Cl_2}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\)
\(m_{Cl_2}=0,06.71=4,26\left(g\right)\)
b)\(m_{Na_2O}=0,32.62=19,84\left(g\right)\)
\(m_{CaCO_3}=1,44.100=144\left(g\right)\)
3. a) MO2/MN2 = 32/28 = 8/7
b) MO2/MCO = 32/28 = 8/7
c) MO2/Mkk = 32/29
1 tính khối lượng của
a) 0.5 mol Fe2O3
\(M_{Fe_2O_3}=2\times56+3\times16=160\) (g/mol)
\(m_{Fe_2O_3}=n_{Fe_2O_3}\times M_{Fe_2O_3}=0,5\times112=56\left(g\right)\)
b) 0,15 mol CO2
\(M_{CO_2}=1\times12+2\times16=44\) (g/mol)
\(m_{CO_2}=n_{CO_2}\times M_{CO_2}=0,15\times44=6,6\left(g\right)\)
c) 5,6 lít O2 ( điều kiện tiêu chuẩn )
\(n_{O_2}=\frac{V_{O_2}}{22,4}=\frac{5,6}{22,4}=0,25\left(mol\right)\)
\(M_{O_2}=2\times16=32\) (g/mol)
\(m_{O_2}=n_{O_2}\times M_{O_2}=0,25\times32=8\left(g\right)\)
d) 8,96 lít H2 ( điều kiện tiêu chuẩn)
\(n_{H_2}=\frac{V_{H_2}}{22,4}=\frac{8,96}{22,4}=0,4\left(mol\right)\)
\(M_{H_2}=2\times1=2\) (g/mol)
\(m_{H_2}=n_{H_2}\times M_{H_2}=0,4\times2=0,8\left(g\right)\)
2 tính thể tích ( điều kiện tiêu chuẩn)
a) 0,125 mol Cl2
\(V_{Cl_2}=22,4\times n_{Cl_2}=22,4\times0,125=2,8\left(l\right)\)
b) 2,5 mol CH4
\(V_{CH_4}=22,4\times n_{CH_4}=22,4\times2,5=56\left(l\right)\)
c) 6,4 gam 02
\(M_{O_2}=2\times16=32\) (g/mol)
\(n_{O_2}=\frac{m_{O_2}}{M_{O_2}}=\frac{6,4}{32}=0,2\left(mol\right)\)
\(V_{O_2}=22,4\times n_{O_2}=22,4\times0,2=4,48\left(l\right)\)
d) 5,6 gam N2
\(M_{N_2}=2\times14=28\) (g/mol)
\(n_{N_2}=\frac{m_{N_2}}{M_{N_2}}=\frac{5,6}{28}=0,2\left(mol\right)\)
\(V_{N_2}=22,4\times n_{N_2}=22,4\times0,2=4,48\left(l\right)\)
3 tính tỉ khối của khí O2 so với
a) khí N2
\(d_{O_2;N_2}=\frac{M_{O_2}}{M_{N_2}}=\frac{2\times16}{2\times14}=\frac{8}{7}\)
b) khí CO
\(d_{O_2;CO}=\frac{M_{O_2}}{M_{CO}}=\frac{2\times16}{1\times12+1\times16}=\frac{8}{7}\)
c) không khí
\(d_{O_2;kk}=\frac{M_{O_2}}{M_{kk}}=\frac{2\times16}{29}=\frac{32}{29}\)
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)
\(V_{N_2\left(\text{đ}ktc\right)}=n.22,4=0,25.22,4=5,6\left(l\right)\\ n_{O_2}=\dfrac{m}{M}=\dfrac{4,8}{32}=0,15\left(mol\right)\Rightarrow V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,15.22,4=3,36\left(l\right)\)
bạn giải cho mình thêm dc ko ạ
Hãy tính thể tích không khí cần dùng để đốt cháy hoàn toàn 13,44 lit khí B. Biết rằng: - Khí Oxi chiếm 1/5 thể tích không khí. - Khí B có tỉ khối so với hidro bằng 8. Thành phần % theo khối lượng của khí B là 75%C và 25% H.
\(nCO2=\dfrac{0.44}{44}=0.01mol\)
\(\Rightarrow V_{CO2}=0.01\times22.4=0.224l\)
\(nH2=\dfrac{0.04}{4}=0.01mol\)
\(\Rightarrow V_{H2}=0.01\times22.4=0.224l\)
=> Tổng thể tích: \(V_{CO2}+V_{H2}=0.224+0.224=0.448\)
\(nCH4=\dfrac{1.12}{22.4}=0.05mol\Rightarrow mCH4=0.05\times16=0.8g\)
\(mO2=0.2\times32=6.4g\)
Tổng khối lượng: mCH4 + mO2 = 0.8 + 6.4 = 7.2g
\(a,n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
\(n_{CO_2}=0,5.44=11\left(g\right)\)
\(b,n_{NH_3}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)
\(n_{NH_3}=0,45,17=7,65\left(g\right)\)
\(c,n_{NO_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\)
\(n_{NO_2}=0,75.46=34,5\left(g\right)\)
\(a,n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ m_{CO_2}=0,25\cdot44=11\left(g\right)\\ b,n_{NH_3}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\\ m_{NH_3}=0,45\cdot17=7,65\left(g\right)\\ c,n_{NO_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\\ m_{NO_2}=0,75\cdot46=34,5\left(g\right)\)
1. \(n_{O_2}=\frac{V}{22,4}=\frac{6,72}{22,4}=0,3\left(mol\right)\)
2.
\(n_{CO_2}=\frac{m}{M}=\frac{4,4}{44}=0,1\left(mol\right)\)
\(n_{O_2}=\frac{m}{M}=\frac{3,2}{32}=0,1\left(mol\right)\)
\(V_{HC}=n.22,4=\left(0,1+0,1\right).22,4=4,48\left(l\right)\)
Bài 5:
\(m_{Y}=m_{SO_2}+m_{CH_4}=\dfrac{3,36}{22,4}.64+\dfrac{13,44}{22,4}.16=19,2(g)\)
Bài 6:
\(V_{CO_2}=0,15.22,4=3,36(l)\\ V_{NO_2}=0,2.22,4=4,48(l)\\ V_{SO_2}=0,02.22,4=0,448(l)\\ V_{N_2}=0,03.22,4=0,672(l)\)
a) \(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)
b) \(n_{N_2}=\dfrac{1,8.10^{23}}{6.10^{23}}=0,3\left(mol\right)\)
=> \(m_{N_2}=0,3.28=8,4\left(g\right)\)
c) \(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)=>V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
d) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
=> Số phân tử H2 = 0,15.6.1023 = 0,9.1023
e) \(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
f) \(n_{Cl_2}=\dfrac{3,6.10^{23}}{6.10^{23}}=0,6\left(mol\right)\)
=> VCl2 = 0,6.22,4 = 13,44(l)
g) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
=> mO2 = 0,3.32 = 9,6(g)
h) \(n_{K_2O}=\dfrac{18,8}{94}=0,2\left(mol\right)\)
=> Số phân tử K2O = 0,2.6.1023 = 1,2.1023
i) \(n_{CaO}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
=> Số phân tử CaO = 0,2.6.1023 = 1,2.1023
nHCl = 0,2.1,5 = 0,3 (mol)
=> mHCl = 0,3.36,5 = 10,95(g)
\(a.n_{Na}=\dfrac{4,6}{23}=0,2\left(mol\right)\\ n_{KOH}=\dfrac{8,4}{56}=0,15\left(mol\right)\\ n_{H_3PO_4}=\dfrac{11,76}{98}=0,12\left(mol\right)\\ n_{O_2}=\dfrac{16}{32}=0,5\left(mol\right)\\ b.n_{C_2H_4}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ n_{CO_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\ n_{N_2}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)