\(n_{Ca}=\dfrac{12}{40}=0,3\left(mol\right)\)
PT: \(Ca+H_2SO_4\rightarrow CaSO_4+H_2\)
Theo PT: \(n_{H_2SO_4}=n_{CaSO_4}=n_{H_2}=n_{Ca}=0,3\left(mol\right)\)
a, \(V_{H_2}=0,3.24,79=7,437\left(l\right)\)
b, \(m_{CaSO_4}=0,3.136=40,8\left(g\right)\)
c, \(V_{H_2SO_4}=\dfrac{0,3}{1,6}=0,1875\left(l\right)\)