Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
2Zn+O2-to>2ZnO
7\130--7\260
n Zn=\(\dfrac{7}{130}mol\)
=>VO2=\(\dfrac{7}{260}22,4\)=0,6l
b)
2KClO3-to>2KCl+3O2
=>7\390---------------7\260
=>m KClO3=\(\dfrac{7}{390}\).122,5=2,198g
2Zn+O2-to>2ZnO
0,05--0,025---0,05
n Zn=0,05 mol
=>=>VO2=0,025.22,4=0,56l
2KClO3-to->2KCl+3O2
1\60------------------------0,025
=>m KClO3=\(\dfrac{1}{60}\).122,5=2,041g
\(n_{Zn}=\dfrac{3,25}{65}=0,05mol\)
\(2Zn+O_2\underrightarrow{t^o}2ZnO\)
0,05 0,025
\(V_{O_2}=0,025\cdot22,4=0,56l\)
\(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
\(\dfrac{1}{60}\) 0,025
\(m_{KClO_3}=\dfrac{1}{60}\cdot122,5=2,042g\)
nFe = 16,8/56 = 0,3 (mol)
PTHH: 3Fe + 2O2 -> (t°) Fe3O4
Mol: 0,3 ---> 0,2
VO2 = 0,2 . 22,4 = 4,48 (l)
PTHH: 4P + 5O2 -> (t°) 2P2O5
Mol: 0,16 <--- 0,2
mP = 0,16 . 31 = 4,96 (g)
a) \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
PTHH: 4Al + 3O2 --to--> 2Al2O3
0,2-->0,15
=> V = 0,15.22,4 = 3,36 (l)
b)
PTHH: 2KMnO4 --to--> K2MnO4 + MnO2 + O2
0,3<----------------------------0,15
=> mKMnO4(lý thuyết) = 0,3.158 = 47,4 (g)
=> \(m_{KMnO_4\left(tt\right)}=\dfrac{47,4.110}{100}=52,14\left(g\right)\)
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 )
\(V_{O_2}=0,0125.24,79=0,309875l\)
a) \(n_{SO_2}=\dfrac{6,4}{64}=0,1\left(mol\right)\)
PTHH : S + O2 - to---> SO2
0,1 0,1 0,1 ( mol )
b) \(m_S=0,1.32=3,2\left(g\right)\)
\(V_{O_2}=0,1.22,4=2,24\left(l\right)\)
a. \(n_{KMnO_4}=\dfrac{47.4}{158}=0,3\left(mol\right)\)
PTHH : 2KMnO4 ---to----> K2MnO4 + MnO2 + O2
0,3 0,15
\(V_{O_2}=0,15.22,4=3,36\left(l\right)\)
b. PTHH : 4Al + 3O2 -> 2Al2O3
0,2 0,15
\(m_{Al}=0,2.27=5,4\left(g\right)\)
\(a,PTHH:2Zn+O_2\underrightarrow{t^o}2ZnO\)
\(2:1:2\left(mol\right)\)
\(0,05:0,025:0,05\left(mol\right)\)
\(n_{Zn}=\dfrac{m}{M}=\dfrac{3,25}{65}=0,05\left(mol\right)\)
\(b,V_{O_2}=n.22,4=0,025.22,4=0,56\left(l\right)\)
Cho minh hỏi câu c đâu