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a, PT: \(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
Ta có: \(n_{CuO}=\dfrac{12}{80}=0,15\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{Cu}=n_{H_2O}=n_{CuO}=0,15\left(mol\right)\)
b, \(m_{Cu}=0,15.64=9,6\left(g\right)\)
\(m_{H_2O}=0,15.18=2,7\left(g\right)\)
c, \(V_{H_2}=0,15.24,79=3,7185\left(l\right)\)
\(n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: 2Cu + O2 --to--> 2CuO
0,1-------->0,2
=> mCuO = 0,2.80 = 16(g)
a. \(n_{Cu}=\dfrac{28.8}{64}=0,45\left(mol\right)\)
PTHH : CuO + H2 -> Cu + H2O
0,45 0,45 0,45 0,45
\(V_{H_2}=0,45.22,4=10,08\left(l\right)\)
b. \(m_{Cu}=0,45.64=28,8\left(g\right)\)
ncu = 28,8/64 = 0,45 mol
CuO + H2 -> Cu + H2O
1 : 1 : 1 : 1
0,45mol
a) nH2 = (0,45.1) : 1 = 0,45 mol
VH2 = 0,45 . 22,4 = 10,08 ( l )
b) mCu = 0,45 . 64 = 28,8 ( g)
1.\(n_{Fe_3O_4}=\dfrac{2,32}{232}=0,01mol\)
\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)
0,3 0,1 ( mol )
\(m_{Fe}=0,3.56=16,8g\)
2.\(n_{Cu}=\dfrac{3,2}{64}=0,05mol\)
\(2Cu+O_2\rightarrow\left(t^o\right)2CuO\)
0,05 0,05 ( mol )
\(m_{CuO}=0,05.80=4g\)
3.\(n_{Na}=\dfrac{4,6}{23}=0,2mol\)
\(4Na+O_2\rightarrow\left(t^o\right)2Na_2O\)
0,2 0,05 ( mol )
\(V_{O_2}=0,05.24,79=1,2395l\)
4.\(n_{Cu}=\dfrac{1,6}{64}=0,025mol\)
\(2Cu+O_2\rightarrow\left(t^o\right)2CuO\)
0,025 0,0125 ( mol )
\(V_{O_2}=0,0125.24,79=0,309875l\)
\(n_{Cu}=\dfrac{2,56}{64}=0,04mol\)
\(2Cu+O_2\underrightarrow{t^o}2CuO\)
0,04 0,02 0,04
\(V_{O_2}=0,02\cdot22,4=4,48l\)
\(m_{CuO}=0,04\cdot80=3,2g\)
nCu = 2,56 : 64 =0,04 (mol)
pthh : 2Cu + O2 -t--> 2CuO
0,04->0,02----->0,04 (mol)
VO2 = 0,02 .22,4 =0,448 (l)
mCuO = 0,04 . 80 =3,2 (g)
\(n_{O_2}=\dfrac{2,479}{24,79}=0,1(mol)\\ 2Cu+O_2\xrightarrow{t^o}2CuO\\ \Rightarrow n_{CuO}=0,2(mol)\\ \Rightarrow m_{CuO}=0,2.80=16(g)\)