Tính số mol:
1) 16 g C
2) 26 g Zn
3) 8 g NaOH
4) 12,4 g P
5) 31,5 g HNO3
6)4,48 l khí N2
7) 13,44 l khí Cl2
8) 67200 ml khí CO2
9) 35840 ml khí H2
10) 20,16 l khí O2
K
Khách
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8 tháng 9 2023
2:
a: \(V=0.2\cdot22.4=4.48\left(lít\right)\)
b: \(n_{N_3}=\dfrac{14}{42}=\dfrac{1}{3}\left(mol\right)\)
\(V=\dfrac{1}{3}\cdot22.4=\dfrac{224}{30}\left(lít\right)\)
3:
a: \(m_{CaCO_3}=0.5\cdot\left(40+12+16\cdot3\right)=50\left(g\right)\)
b: \(n_{SO_2}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(m_{SO_2}=0.25\cdot\left(32+16\cdot2\right)=16\left(g\right)\)
TP
Thảo Phương
CTVVIP
29 tháng 11 2021
\(1.m_{Cu}=1,2.64=76,8\left(g\right)\\ 2.m_{NaCl}=1,25.58,5=73,125\\ 3.n_{C_6H_{12}O_6}=\dfrac{7,2.10^{23}}{6.10^{23}}=1,2\left(mol\right)\\ \Rightarrow m_{C_6H_{12}O_6}=1,2.180=216\left(g\right)\\ 4.n_{O_2}=3,6.32=115,2\left(g\right)\\ 5.n_{O_2}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2\left(mol\right)\\ \Rightarrow m_{O_2}=0,2.32=6,4\left(g\right)\\ 6.n_{N_2}=\dfrac{26,88}{22,4}=1,2\left(mol\right)\\ \Rightarrow m_{N_2}=1,2.28=33,6\left(g\right)\\ 7.n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ \Rightarrow m_{CO_2}=0,5.44=22\left(g\right)\\ 8.n_{H_2}=\dfrac{31,36}{22,4}=1,4\left(mol\right)\\ \Rightarrow m_{H_2}=1,4.2=2,8\left(g\right)\)
29 tháng 11 2021
\(1,m_{Cu}=1,2\cdot64=76,8\left(g\right)\\ 2,m_{NaCl}=1,25\cdot58,5=73,125\left(g\right)\\ 3,n_{C_6H_{12}O_6}=\dfrac{7,2\cdot10^{-23}}{6\cdot10^{-23}}=1,2\left(mol\right)\\ \Rightarrow m_{C_6H_{12}O_6}=1,2\cdot180=216\left(g\right)\\ 4,m_{O_2}=3,6\cdot32=115,2\left(g\right)\\ 5,n_{O_2}=\dfrac{1,2\cdot10^{-23}}{6\cdot10^{-23}}=0,2\left(mol\right)\\ \Rightarrow m_{O_2}=0,2\cdot32=6,4\left(g\right)\\ 6,n_{N_2}=\dfrac{26,88}{22,4}=1,2\left(mol\right)\\ \Rightarrow m_{N_2}=1,2\cdot28=33,6\left(g\right)\\ 7,n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ \Rightarrow m_{CO_2}=0,5\cdot44=22\left(g\right)\\ 8,n_{H_2}=\dfrac{31,36}{22,4}=1,4\left(mol\right)\\ \Rightarrow m_{H_2}=1,4\cdot2=2,8\left(g\right)\)
TP
Thảo Phương
CTVVIP
8 tháng 12 2021
\(a.n_{H_2}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2\left(mol\right)\\ n_{SO_2}=\dfrac{6,4}{64}=0,1\left(mol\right)\\ V_X=\left(1,5+2,5+0,2+0,1\right).22,4=96,32\left(l\right)\\b. m_X=1,5.32+2,5.28+0,2.2+6,4=124,8\left(g\right)\)
13 tháng 12 2021
a.nH2=1,2.10236.1023=0,2(mol)nSO2=6,464=0,1(mol)VX=(1,5+2,5+0,2+0,1).22,4=96,32(l)b.mX=1,5.32+2,5.28+0,2.2+6,4=124,8(g)
B
19 tháng 3 2022
a)
C+O2-to>CO2
0,2---------0,2
nO2=0,2 mol
=>C dư
=>m CO2=0,2.44=8,8g
b) C+O2-to>CO2
0,5------------0,5 mol
n C=0,5 mol
n O2=0,6 mol
=>O2 dư
=>m CO2=0,5.44=22g
19 tháng 3 2022
\(a,n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\ PTHH:C+O_2\underrightarrow{t^o}CO_2\\ LTL:0,3>0,2\Rightarrow C.du\\ Theo.pt:n_{CO_2}=n_{O_2}=0,2\left(mol\right)\\ m_{CO_2}=0,2.44=8,8\left(g\right)\\ b,n_C=\dfrac{6}{12}=0,5\left(mol\right)\\ n_{O_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\\ PTHH:C+O_2\underrightarrow{t^o}CO_2\\ LTL:0,5< 0,6\Rightarrow O_2.du\\ Theo.pt:n_{CO_2}=n_C=0,5\left(mol\right)\\ m_{CO_2}=0,5.44=22\left(g\right)\)
DM
14 tháng 6 2016
nMnO2=69,6/87=0,8 mol
MnO2 +4 HCl =>MnCl2 +Cl2 +2H2O
0,8 mol =>0,8 mol
khí X là Cl2
VCl2=0,8.22,4=17,92 lit
nNaOHbđ=0,5.4=2 mol
Cl2 +2NaOH =>NaCl +NaClO +H2O
0,8 mol=>1,6 mol=>0,8 mol=>0,8 mol
dư 0,4 mol
CM dd NaOH dư=0,4/0,5=0,8M
CM dd NaCl=CM dd NaClO=0,8/0,5=1,6M
0,8 mol
\(1.n_C=\dfrac{16}{12}=1,33\left(mol\right)\\ 2.n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\\ 3.n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\\ 4.n_P=\dfrac{12,4}{31}=0,4\left(mol\right)\\ 5.n_{HNO_3}=\dfrac{31,5}{63}=0,5\left(mol\right)\\ 6.n_{N_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\ 7.n_{Cl_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\\ 8.n_{CO_2}=\dfrac{67,2}{22,4}=3\left(mol\right)\\ 9.n_{H_2}=\dfrac{35,84}{22,4}=1,6\left(mol\right)\\ 10.n_{O_2}=\dfrac{20,16}{22,4}=0,9\left(mol\right)\)
\(1,n_C=\dfrac{16}{12}\approx1,33(mol)\\ 2,n_{Zn}=\dfrac{26}{65}=0,4(mol)\\ 3,n_{NaOH}=\dfrac{8}{40}=0,2(mol)\\ 4,n_{P}=\dfrac{12,4}{31}=0,4(mol)\\ 5,n_{HNO_3}=\dfrac{31,5}{63}=0,5(mol)\\ 6,n_{N_2}=\dfrac{4,48}{22,4}=0,2(mol)\)