Question

Làm rồi giải thích tại sao luôn giúp em ạ ;-;

Answer 1

1a.\(nMg=\dfrac{2.4}{24}=0.1mol\Rightarrow nO2=\dfrac{0.1}{2}=0.05mol\)

\(\Rightarrow V_{O2}=0.05\times22.4=11.2l\)

b.nMg = nMgO = 0.1 mol

\(\Rightarrow mMgO=0.1\times40=4g\)

2.4Al + 3O2 -> 2Al2O3

a.\(nAl=\dfrac{1.35}{27}=0.05mol\Rightarrow nO2=\dfrac{0.05\times3}{4}=0.0375mol\)

\(V_{O2}=0.0375\times22.4=0.84l\)

b.\(nAl2O3=\dfrac{0.05}{2}=0.025mol\)

\(mAl2O3=0.025\times102=2.55g\)