\(Theo-\text{đ}\text{ề}-b\text{ài}-ta-c\text{ó}:\left\{{}\begin{matrix}nCu=\dfrac{6,4}{64}=0,1\left(mol\right)\\nO2=\dfrac{2,4}{32}=0,075\left(mol\right)\end{matrix}\right.\)
Ta có PTHH :
\(2Cu+O2-^{t0}\rightarrow2CuO\)
0,1mol....0,05mol...0,1mol
Theo PTHH ta có :
nCu = \(\dfrac{0,1}{2}< nO2=\dfrac{0,075}{1}mol\) => nO2 dư ( tính theo nCu)
a) Ta có : mO2(dư) = (0,075-0,05).32=0,8(g)
b) Ta có : mCuO=0,1.80=8(g)
c) Ta có PTHH :
\(O2+2H2-^{t0}\rightarrow2H2O\)
0,025mol..0,05mol
=> mH2(cần) = 0,05.2=0,1(g)
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