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\(a.\)
\(n_{O_2}=\dfrac{0.15\cdot N}{N}=0.15\left(mol\right)\)
\(m_{O_2}=0.15\cdot32=48\left(g\right)\)
\(V_{O_2}=0.15\cdot22.4=3.36\left(l\right)\)
\(b.\)
\(n_{CO_2}=\dfrac{1.44\cdot10^{23}}{6\cdot10^{23}}=0.24\left(mol\right)\)
\(m_{CO_2}=0.24\cdot44=10.56\left(g\right)\)
\(V_{CO_2}=0.24\cdot22.4=5.376\left(l\right)\)
\(c.\)
\(m_{H_2}=0.25\cdot2=0.5\left(g\right)\)
\(V_{H_2}=0.25\cdot22.4=5.6\left(l\right)\)
\(d.\)
\(m_{CH_4}=1.5\cdot16=24\left(g\right)\)
\(V_{CH_4}=1.5\cdot22.4=33.6\left(l\right)\)
\(e.\)
\(n_{CO_2}=\dfrac{8.8}{44}=0.2\left(mol\right)\)
\(V_{CO_2}=0.2\cdot22.4=4.48\left(l\right)\)
a)
$V_{O_2} = 0,2.22,4 = 4,48(lít)$
b)
$n_{SO_2} = \dfrac{76,8}{64} = 1,2(mol)$
$V_{SO_2} = 1,2.22,4 = 26,88(lít)$
c)
$n_{N_2} = \dfrac{7,5.10^{23}}{6.10^{23}} = 1,25(mol)$
$V_{N_2} = 1,25.22,4 = 28(lít)$
d)
$V_X = (0,2 + 0,25).22,4 = 10,08(lít)$
a) V(O2,đktc)=0,2.22,4=4,48(l)
b) V(SO2,đktc)= (76,8/64).22,4=26,88(l)
c) V(N2,đktc)= [(7,5.1023)/(6.1023)].22,4= 28(l)
d) VhhX(đktc)= V(O2,đktc) + V(N2,đktc)= 0,2.22,4+0,25.22,4=10,08(l)
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)
a) Gọi số mol H2 phản ứng là a (mol)
PTHH: Fe2O3 + 3H2 --to--> 2Fe + 3H2O
mgiảm = mO(mất đi) = 4,8 (g)
=> nO(mất đi) = \(\dfrac{4,8}{16}=0,3\left(mol\right)\)
=> \(n_{H_2O}=0,3\left(mol\right)\)
=> \(n_{H_2}=0,3\left(mol\right)\)
=> \(V_{H_2}=0,3.22,4=6,72\left(l\right)\)
b) \(n_{Fe}=0,2\left(mol\right)\)
=> \(m_{Fe}=0,2.56=11,2\left(g\right)\)
\(n_{Fe_2O_3}=0,1\left(mol\right)\)
=> \(m_{Fe_2O_3}=0,1.160=16\left(g\right)\)
\(n_{Zn}=\dfrac{19,5}{65}=0,3\left(mol\right)\)
PTHH :
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,3 0,3
a) \(V_{H_2}=0,3.22,4=6,72\left(l\right)\)
b) \(H_2+O_2\rightarrow2H_2O\)
0,3 0,3
\(V_{O_2}=0,3.22,4=6,72\left(l\right)\)
\(V_{kk}=6,72.5=33,6\left(l\right)\)
a) nZn= 0,26(mol)
PTHH: Zn + H2SO4 -> ZnSO4 + H2
nH2=nZn=0,26(mol)
b) -> V(H2,thực tế đktc)= (100% - 8%) x 0,26 x 22,4= 5,35808(l)
C+O2to-->CO2
0,3--0,3--0,3
nC = 3,6 / 12 = 0,3 (mol)
=> VCO2(đktc) = 0,3 x 22,4 =6,72lít
=>Vkk=6,72\5=33,6l
PTHH: \(C+O_2\underrightarrow{t^o}CO_2\)
a) Ta có: \(n_C=\dfrac{3,6}{12}=0,3\left(mol\right)=n_{CO_2}\)
\(\Rightarrow V_{CO_2}=0,3\cdot22,4=6,72\left(l\right)\)
b) Theo PTHH: \(n_{O_2}=n_C=0,3mol\)
\(\Rightarrow V_{O_2}=6,72\left(l\right)\) \(\Rightarrow V_{kk}=6,72\cdot5=33,6\left(l\right)\)
a)
\(n_{N_2}=\dfrac{m}{M}=\dfrac{0,28}{28}=0,01\left(mol\right)\)
\(V_{N_2\left(dktc\right)}=n\cdot22,4=0,01\cdot22,4=0,224\left(l\right)\)
b)
\(n_{CuCl_2}=\dfrac{0,3\cdot10^{23}}{6\cdot10^{23}}=0,05\left(mol\right)\\ m_{CuCl_2}=0,05\cdot\left(64+71\right)=6,75\left(g\right)\)
\(m_{ZnCl_2}=n\cdot M=0,2\cdot\left(65+71\right)=27,2\left(g\right)\)
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