Đáp án C.

FeS₂→ 2H₂SO₄

0,08    ← 0,16   (mol)

H% = 0,08.100/0,1= 80%

\(m_{FeS_2}=\dfrac{1.60}{100}=0,6\left(tấn\right)\)

=> \(m_{FeS_2\left(pư\right)}=\dfrac{0,6.80}{100}=0,48\left(tấn\right)\)

Cứ 1 mol FeS₂ điều chế được 2 mol H₂SO₄

=> 120g FeS₂ điều chế được 196g H₂SO₄

=> 0,48 tấn FeS₂ điều chế được 0,784 tấn H₂SO₄

=> \(m_{ddH_2SO_4}=\dfrac{0,784.100}{98}=0,8\left(tấn\right)\)

\(m_{FeS_2}=0.6\left(tấn\right)=0.6\cdot10^3\left(kg\right)\)

\(n_{FeS_2}=\dfrac{0.6\cdot10^3}{120}=\dfrac{10^3}{200}\left(kmol\right)\)

Dựa vào sơ đồ phản ứng : 

\(n_{H_2SO_4}=2n_{FeS_2}=2\cdot\dfrac{10^3}{200}=\dfrac{10^3}{100}=10\left(kmol\right)\)

\(m_{H_2SO_4\left(tt\right)}=10\cdot\dfrac{98}{80\%}=1225\left(kg\right)\)

\(m_{dd_{H_2SO_4}}=\dfrac{1225}{98\%}=1250\left(kg\right)=12.5\left(tấn\right)\)

a)

\(4FeS_2 + 11O_2 \xrightarrow{t^o} 2Fe_2O_3 + 4SO_2\\ 2SO_2 + O_2 \xrightarrow{t^o,V_2O_5} 2SO_3\\ SO_3 + H_2O \to H_2SO_4\)

b)

\(m_{FeS_2} = 1000.60\% = 600(kg)\\ n_{FeS_2} = \dfrac{600}{120} = 5(kmol)\\ \Rightarrow n_{FeS_2\ pư} = 5.80\% = 4(kmol)\)

Bảo toàn nguyên tố với S : \(n_{H_2SO_4} = 2n_{FeS_2} = 4.2 = 8(kmol)\)

Suy ra :

\(m_{H_2SO_4} = 8.98 = 784(kg)\\ \Rightarrow m_{dd\ H_2SO_4} = \dfrac{784}{98\%} =800(kg)\)

a)

$4FeS_2 + 11O_2 \xrightarrow{t^o} 2Fe_2O_3 + 8SO_2$
$2SO_2 + O_2 \xrightarrow{t^o,xt} 2SO_3$
$SO_3 + H_2O \to H_2SO_4$

b)

$m_{FeS_2} = 1000.60\% = 600(kg)$
$n_{FeS_2} = \dfrac{600}{120} = 5(kmol)$
$n_{FeS_2\ pư} = 5.80\% = 4(kmol)$

$n_{H_2SO_4} = 2n_{FeS_2} = 8(kmol)$
$m_{H_2SO_4} = 8.98 = 784(kg)$

b)

mFeS2=1000.60%=600(kg)

mFeS2=1000.60%=600(kg)
nFeS2=600120=5(kmol)
nFeS2 pư=5.80%=4(kmol)

nFeS2 pư=5.80%=4(kmol)

nH2SO4=2nFeS2=8(kmol)

nH2SO4=2nFeS2=8(kmol)
mH2SO4=8.98=784(kg)

\(n_{C_4H_6} = n.n_{cao\ su} = n.\dfrac{1000}{54n} = \dfrac{500}{27}(kmol)\\ n_{C_2H_5OH} = 2.\dfrac{1}{60\%}.n_{C_4H_6} = \dfrac{5000}{81}(kmol)\\ n_{C_6H_{12}O_6} = \dfrac{1}{2}.\dfrac{1}{80\%}.n_{C_2H_5OH} = \dfrac{3125}{81}(kmol)\\ m_{gỗ} = \dfrac{m_{C_6H_{12}O_6}}{35\%} = \dfrac{\dfrac{3125}{81}.180}{35\%} = 19841,25(kg)\)

Đáp án A

\(m_{H_2SO_4}=\dfrac{1000000.98\%}{100\%}=980000(g)\\ \Rightarrow n_{H_2SO_4}=\dfrac{980000}{98}=10000(mol)\\ \Rightarrow n_{FeS_2}=\dfrac{1}{2}n_{H_2SO_4}.80\%=4000(mol)\\ \Rightarrow m_{FeS_2}=4000.120=480000(g)\)