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a) \(n_{Cu}=\dfrac{12,8}{64}=0,2\left(mol\right)\)
b) \(n_{CO_2}=\dfrac{66}{44}=1,5\left(mol\right)\)
c) \(n_{Fe_2\left(SO_4\right)_3}=\dfrac{25}{400}=0,0625\left(mol\right)\)
d) \(n_{Fe_2O_3}=\dfrac{8}{160}=0,05\left(mol\right)\)
e) \(n_{NH_3}=\dfrac{1,8.10^{22}}{6.10^{23}}=0,03\left(mol\right)\)
f) \(n_{Cl_2}=\dfrac{20,16}{22,4}=0,9\left(mol\right)\)
a) $4P + 5O_2 \xrightarrow{t^o} 2P_2O_5$
b) $Mg + Cl_2 \xrightarrow{t^o} MgCl_2$
c) $2Na + 2H_2O \to 2NaOH + H_2$
d) $C + O_2 \xrightarrow{t^o} CO_2$
e) $C_xH_y + (x + \dfrac{y}{4})O_2 \xrightarrow{t^o} xCO_2 + \dfrac{y}{2}H_2O$
f) $2Al + Fe_2O_3 \xrightarrow{t^o} Al_2O_3 + 2Fe$
g) $2Al + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2$
i) $Fe_xO_y + yCO \xrightarrow{t^o} xFe + yCO_2$
k) $Fe_2O_3 + 6HCl \to 2FeCl_3 +3 H_2O$
l) $3Fe + 2O_2 \xrightarrow{t^o} Fe_3O_4$
Bài 1:
a) N2 + 3H2 \(\underrightarrow{to}\) 2NH3
b) 2Al + 3H2SO4 → Al2(SO4)3 + 3H2↑
c) Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
d) C2H4 + \(\dfrac{5}{2}\)O2 \(\underrightarrow{to}\) 2CO2 + 2H2O
Bài 2:
a) FeO + H2SO4 → FeSO4 + H2O
b) 2Al + 6HCl → 2AlCl3 + 3H2↑
c) NaOH + HCl → NaCl + H2O
d) Na2CO3 + BaCl2 → 2NaCl + BaCO3
e) 2Mg + O2 \(\underrightarrow{to}\) 2MgO
f) Zn + 2HCl → ZnCl2 + H2↑
g) 2Al + 3CuCl2 → 2AlCl3 + 3Cu
h) 2Na + Cl2 \(\underrightarrow{to}\) 2NaCl
a) mFeSO4= 0,25.152=38(g)
b) mFeSO4= \(\dfrac{13,2.10^{23}}{6.10^{23}}.152=334,4\left(g\right)\)
c) mNO2= \(\dfrac{8,96}{22,4}.46=18,4\left(g\right)\)
d) mA= 27.0,22+64.0,25=21,94(g)
e) mB= \(\dfrac{11,2}{22,4}.32+\dfrac{13,44}{22,4}.28=32,8\left(g\right)\)
g) mC= \(64.0,25+\dfrac{15.10^{23}}{6.10^{23}}.56=156\left(g\right)\)
h) mD= \(0,25.32+\dfrac{11,2}{22,4}.44+\dfrac{2,7.10^{23}}{6.10^{23}}.28=42,6\left(g\right)\)
hơi muộn nha<3
a)
\(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\)
\(n_{Ca}=\dfrac{20}{40}=0,5\left(mol\right)\)
\(n_{CaCO_3}=\dfrac{25}{100}=0,25\left(mol\right)\)
\(n_{NaOH}=\dfrac{4}{40}=0,1\left(mol\right)\)
\(n_{H_2O}=\dfrac{1,5.10^{23}}{6.10^{23}}=0,25\left(mol\right)\)
b)
\(m_{ZnSO_4}=0,25.161=40,25\left(g\right)\)
\(m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)
\(m_{Cu}=0,3.64=19,2\left(g\right)\)
\(m_{Fe_2\left(SO_4\right)_3}=0,35.400=140\left(g\right)\)
c)
\(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
\(V_{Cl_2}=0,15.22,4=3,36\left(l\right)\)
\(V_{SO_2}=0,3.22,4=6,72\left(l\right)\)
\(V_{CH_4}=0,5.22,4=11,2\left(l\right)\)
a: \(n_{Fe}=\dfrac{14}{56}=0.25\left(mol\right)\)
\(n_{Ca}=\dfrac{20}{40}=0.5\left(mol\right)\)
B1:
a) \(2Cu+O_2\rightarrow2CuO\)
b) Theo định luật bảo toàn khối lượng, khối lượng CuO thu được là:
\(m_{CuO}=m_{Cu}+m_{O_2}=12,8+3,2=16\)
B2:
a) \(Na_2O+H_2O\rightarrow2NaOH\)
b) \(2Na+2H_2O\rightarrow2NaOH+H_2\)
c) \(2Cu+O_2\rightarrow2CuO\)
d) \(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
e) \(2Fe_2O_3+3C\rightarrow4Fe+3CO_2\)
g) \(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)
Tính số mol hả ?
uk
ban ạ