a, PTHH:\(Mg+2HCl\rightarrow MgCl_2+H_2\uparrow\)
\(n_{Mg}=\dfrac{6}{24}=0,25\left(mol\right)\)
Theo PTHH: \(n_{H_2}=n_{Mg}=0,25\left(mol\right)\)
\(V_{H_2\left(đktc\right)}=0,25.22,4=5,6\left(l\right)\)
b, Theo PTHH, \(n_{HCl}=2n_{Mg}=2.0,25=0,5\left(mol\right)\)
\(m_{HCl}=n.M=0,5.36,5=18,25\left(g\right)\)
a, Ta có : \(n_{Mg}=0,25\left(mol\right)\)
PTHH : \(Mg+2HCl\rightarrow MgCl_2+H_2\) (1)
(mol) \(0,25-0,5-0,25-0,25\)
=> \(n_{H_2}=0,25\rightarrow V_{H_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)
b, Theo PT (1) : \(n_{HCl}=0,5\left(mol\right)\Rightarrow m_{HCl}=n.M=0,5.36,5=18,25\left(g\right)\)
c, Câu c bạn nên ghi rõ đầu bài ra , mik đọc ko hiểu gì cả @@
nMg = \(\dfrac{6}{24}\) = 0,25 mol
Mg + 2HCl -> MgCl2 + H2
0,25->0,5 ->0,25
a) VH2 = 0,25 . 22,4 = 5,6 (l)
b) mHCl = 0,5 . 36,5 = 18,25 g
c) nFe2O3 = \(\dfrac{16}{160}\) = 0,1 mol
Fe2O3 + 3H2 -> 2Fe +3 H2O
0,1(dư);0,25(hết)->0,16
=>mFe = 0,16 . 56 = 8,96g