a, \(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)
b, \(n_{Mg}=\dfrac{4,1}{24}=\dfrac{41}{240}\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{MgSO_4}=n_{Mg}=\dfrac{41}{240}\left(mol\right)\)
\(\Rightarrow V_{H_2}=\dfrac{41}{240}.24,79\approx4,23\left(l\right)\)
c, \(m_{MgSO_4}=\dfrac{41}{240}.120=20,5\left(g\right)\)
\(n_{Mg}=\dfrac{4,1}{24}=\dfrac{41}{210}\left(mol\right)\)
PTHH :
\(Mg+H_2SO_4\rightarrow MgSO_4+H_2\uparrow\)
41/210 41/210 41/210
\(b,V_{H_2}=\dfrac{41}{240}.24,79=4,235\left(l\right)\)
\(c,m_{MgSO_4}=\dfrac{41}{240}.120=20,5\left(g\right)\)
\(a)Mg+H_2SO_4\rightarrow MgSO_4+H_2\\ b)n_{Mg}=\dfrac{4,1}{24}\approx0,17mol\\ n_{H_2}=n_{MgSO_4}=n_{Mg}=0,17mol\\ V_{H_2}=0,17.24,79=4,2143l\\ c)m_{MgSO_4}=0,17.120=20,4g\)