\(m_C=1000\cdot90\%=900\left(kg\right)\)
\(n_C=\dfrac{900}{12}=75\left(kmol\right)\)
\(C+O_2\underrightarrow{^{^{t^o}}}CO_2\)
\(75............75\)
\(m_{CO_2}=75\cdot44=3300\left(kg\right)\)
\(m_{CO_2\left(tt\right)}=3300\cdot80\%=2640\left(kg\right)=2.64\left(\text{tấn}\right)\)