PTHH : 2Mg + O2 -> 2MgO
a , nMg = \(\dfrac{4,8}{24}=0,2\left(mol\right)\)
Theo PTHH , nMg = nMgO = 0,2 (mol )
=> mMgO = 0,2 ( 24+16) =8 (g)
b , Theo PTHH , nO2 = 0,5.nMg = 0,1 (mol)
=> VO2(đktc) = 0,1 . 22,4 = 2,24 (l)
c , VKK = 2,24 : 20% =11,2 (l)
PTHH: 2Mg+O2=2MgO.
a) nMg=\(\dfrac{4.8}{24}\) = 0.2(mol)
theo PTHH:nMg=nMgO = 02.(mol)
=>mMgO=0.2(24+16)=8g
b)theo PTHH:nO2=0.5.NMg=0.1(mol)
=>VO2(đktc)=0.1.22.4=2.24(l)
c)VKK=2.24:20% = 11.2(l).
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