a, PT: \(2Mg+O_2\underrightarrow{t^o}2MgO\)
b, Ta có: \(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
Theo PT: \(n_{O_2}=\dfrac{1}{2}n_{Mg}=0,05\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,05.22,4=1,12\left(l\right)\)
c, PT: \(2Zn+O_2\underrightarrow{t^o}2ZnO\)
Theo PT: \(n_{ZnO}=2n_{O_2}=0,1\left(mol\right)\)
\(\Rightarrow m_{ZnO}=0,1.81=8,1\left(g\right)\)
Bạn tham khảo nhé!
a. \(2Mg+O_2\rightarrow2MgO\)
b. \(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
\(\rightarrow n_{O_2}=\dfrac{1}{2}.n_{Mg}=0,05\left(mol\right)\)
\(V_{O_2}=0,05.22,4=1,12\left(l\right)\)
c.
\(2Zn+O_2\rightarrow2ZnO\)
0,1 ...... 0,05 .... 0,1 (mol)
\(\rightarrow m_{ZnO}=0,1.81=8,1\left(g\right)\)
a. PTHH: \(2Mg+O_2\rightarrow2MgO\)
b. \(n_{Mg}=\dfrac{m_{Mg}}{M_{Mg}}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
Ta có PTHH: \(2Mg+O_2\rightarrow2MgO\)
-------------------2----------1------------------
-------------------0,1-------0,05---------------
\(V_{O_2\left(đktc\right)}=n_{O_2}\cdot22,4=0,05\cdot22,4=1,12\left(l\right)\)
c. Ta có PTHH: \(2Zn+O_2\rightarrow2ZnO\)
------------------------------1-------------2------
-----------------------------0,05----------0,1----
\(m_{ZnO}=n_{ZnO}\cdot M_{ZnO}=0,1\cdot81=8,1\left(g\right)\)
