Em tham khảo nha :
\(\begin{array}{l}
1)\\
a)\\
CaC{O_3} \to CaO + C{O_2}\\
b)\\
{n_{CaO}} = \dfrac{{112000}}{{56}} = 2000mol\\
{n_{CaC{O_3}}} = {n_{CaO}} = 2000mol\\
{m_{CaC{O_3}}} = 2000 \times 100 = 200000g = 200kg\\
{m_{CaC{O_3}tt}} = \dfrac{{280 \times 80}}{{100}} = 224g\\
H = \dfrac{{200}}{{224}} \times 100\% = 89,3\% \\
c)\\
{n_{C{O_2}}} = {n_{CaO}} = 2000mol\\
{V_{C{O_2}}} = 2000 \times 22,4 = 44800l\\
2)\\
2Na + C{l_2} \to 2NaCl\\
{n_{NaC{l_2}}} = \dfrac{{4,68}}{{58,5}} = 0,08mol\\
{n_{Na}} = {n_{NaCl}} = 0,08mol\\
{m_{Na}} = 0,08 \times 23 = 1,84g\\
\text{Khối lượng Na cần dùng là :}\\
{m_{N{a_{cd}}}} = \dfrac{{1,84 \times 100}}{{80}} = 2,3g\\
{n_{C{l_2}}} = \dfrac{{{n_{NaCl}}}}{2} = 0,04mol\\
{V_{C{l_2}}} = 0,04 \times 22,4 = 0,896l\\
\text{Thể tích khí cần dùng là :}\\
{V_{C{l_2}cd}} = \dfrac{{0,896 \times 100}}{{80}} = 1,12l
\end{array}\)