nO2=48/32=1,5(mol)
a) PTHH: C+ O2 -to-> CO2
nC=nO2=1,5(mol)
=> mC=nC.M(C)=1,5.12=18(g)
b) PTHH: S+ O2 -to-> SO2
nS=nO2=1,5(mol)
=> mS=nS.M(S)=1,5.32= 48(g)
c) PTHH: 4P + 5 O2 -to->2 P2O5
nP= 4/5. nO2=4/5 . 1,5=1,2(mol)
=>mP=1,2.31=37,2(g)
Chúc em học tốt!
\(n_{O_2}=\dfrac{48}{32}=1.5\left(mol\right)\)
\(a.\)
\(C+O_2\underrightarrow{^{^{t^0}}}CO_2\)
\(n_C=n_{O_2}=1.5\left(mol\right)\)
\(m_C=1.5\cdot12=18\left(g\right)\)
\(b.\)
\(S+O_2\underrightarrow{^{^{t^0}}}SO_2\)
\(n_S=n_{O_2}=1.5\left(mol\right)\)
\(m_S=1.5\cdot32=48\left(g\right)\)
\(c.\)
\(4P+5O_2\underrightarrow{^{^{t^0}}}2P_2O_5\)
\(n_P=\dfrac{4}{5}\cdot n_{O_2}=\dfrac{4}{5}\cdot1.5=1.2\left(mol\right)\)
\(m_P=1.2\cdot31=37.2\left(g\right)\)
