Bài 7:
\(a.m_{Fe}=0,5.56=28\left(g\right)\\ b.n_{p.tử}=\dfrac{6.10^{23}}{6.10^{23}}=1\left(mol\right)\\ m_{CO_2}=44.1=44\left(g\right)\\ m_{Al_2O_3}=1.102=102\left(g\right)\\ m_{C_6H_{12}O_6}=180.1=180\left(g\right)\\ m_{H_2SO_4}=98.1=98\left(g\right)\)
Bài 8:
\(a.n_{Ca}=\dfrac{112}{40}=2,8\left(mol\right)\\ b.m_{HCl}=36,5.0,5=18,25\left(g\right)\\ c.n_{H_2SO_4}=\dfrac{49}{98}=0,5\left(mol\right)\)