PTK: + H₃PO₄ = 191 đvC

         + Na₂CO₃ = 106 đvC

         + SO₃ = 80 đvC

         + NaOH = 49 đvC

         + Al₂(SO₄)₃ = 342 đvC

PTK: + H₃PO₄ = 191 đvC

         + Na₂CO₃ = 106 đvC

         + SO₃ = 80 đvC

         + NaOH = 49 đvC

         + Al₂(SO₄)₃ = 342 đvC

\(PTK_{H_3PO_4}=1.3+31+16.4=98\left(đvC\right)\)

\(PTK_{Na_2CO_3}=23.2+12+16.3=106\left(đvC\right)\)

\(PTK_{SO_3}=32+16.3=80\left(đvC\right)\)

\(PTK_{NaOH}=23+16+1=40\left(đvC\right)\)

\(PTK_{Al_2\left(SO_4\right)_3}=27.2+\left(32+16.4\right).3=342\left(đvC\right)\)

a) \(n_{SO3}=\dfrac{16}{80}=0,2\left(mol\right)\)

⇒ \(A=0,2.6.10^{-23}=1,2.10^{-23}\) (phân tử)

b) \(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)

⇒ \(A=0,2.6.10^{-23}=1,2.10^{-23}\) (phân tử)

c) \(n_{Fe2\left(SO4\right)3}=\dfrac{16}{400}=0,04\left(mol\right)\)

⇒ \(A=0,04.6.10^{-23}=0,24.10^{-23}\) (phân tử)

d) \(n_{Al2\left(SO4\right)3}=\dfrac{34,2}{342}=0,1\left(mol\right)\)

⇒ \(A=0,1.6.10^{-23}=0,6.10^{-23}\) (phân tử)

 Chúc bạn học tốt

trả lời giúp mik ik ạ.3

\(M\) _{\(C_2H_6\)}\(=12.2+1.6=30\) \(đvC\)

\(M\) _{\(MgCO_3\)} \(=24+12+16.3=84\) \(đvC\)

\(M\) _{\(Al_2\left(SO_4\right)_3\)} \(=27.2+32.3+16.12=342\) \(đvC\)

C2H6 là 12*2+1*6=24+6=30 đvC

MgCO3 là 24+12+3*16=84 đvC

Al2(SO4)3 là 27*2+32*3+16*12=242 đvC

\(a,n_{\left(NH_4\right)_3PO_4}=0,6\left(mol\right)\\ \Rightarrow n_N=0,6.3=1,8\left(mol\right)\Rightarrow m_N=1,8.14=25,2\left(g\right)\\ n_H=4.3.0,6=7,2\left(mol\right)\Rightarrow m_H=7,2.1=7,2\left(g\right)\\ n_P=n_{hc}=0,6\left(mol\right)\Rightarrow m_P=0,6.31=18,6\left(g\right)\\ n_O=4.0,6=2,4\left(mol\right)\Rightarrow m_O=2,4.16=38,4\left(g\right)\)

\(b,n_S=\dfrac{6,4}{32}=0,2\left(mol\right)\Rightarrow n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{3}.0,2=\dfrac{1}{15}\left(mol\right)\\ \Rightarrow m_{Al_2\left(SO_4\right)_3}=342.\dfrac{1}{15}=22,8\left(g\right)\\ c,n_{Al_2\left(SO_4\right)_3}=\dfrac{20,52}{342}=0,06\left(mol\right)\\ n_O=4.3.0,06=0,72\left(mol\right)\\ \Rightarrow n_{CO_2}=\dfrac{0,72}{2}=0,36\left(mol\right)\Rightarrow V_{CO_2\left(đktc\right)}=0,36.22,4=8,064\left(l\right)\)

\(M_{5K}=5\cdot39=195\left(đvc\right)\)

\(M_{6N_2}=6\cdot28=168\left(đvc\right)\)

\(M_{3O_2}=3\cdot32=96\left(đvc\right)\)

\(M_{2Al_2\left(SO_4\right)_3}=2\cdot342=684\left(đvc\right)\)

a, \(n_{Al_2\left(SO_4\right)_3}=\dfrac{42,75}{342}=0,125\left(mol\right)\)

\(n_O=12n_{Al_2\left(SO_4\right)_3}=1,5\left(mol\right)\)

b, \(n_{O\left(Al_2O_3\right)}=3n_{Al_2O_3}=2n_{O\left(Al_2\left(SO_4\right)_3\right)}=3\left(mol\right)\)

\(\Rightarrow n_{Al_2O_3}=1\left(mol\right)\)

\(\Rightarrow m_{Al_2O_3}=102\left(g\right)\)

PTK: 27.2 + ( 32.3 + 16.12 ) = 310 đvC

PTK=27.2+32.3+16.12=342 dvC

\(PTK_{Ca\left(OH\right)_2}=NTK_{Ca}+2.\left[NTK_O+NTK_H\right]=40+2.\left(16+1\right)=74\left(đ.v.C\right)\\ PTK_{Fe\left(OH\right)_3}=NTK_{Fe}+3.\left[NTK_O+NTK_H\right]=56+3.\left(16+1\right)=107\left(đ.v.C\right)\\ PTK_{KNO_3}=NTK_K+NTK_N+3.NTK_O=39+14+3.16=101\left(đ.v.C\right)\\ PTK_{Fe_2O_3}=2.NTK_{Fe}+3.NTK_O=2.56+3.16=160\left(đ.v.C\right)\)

\(PTK_{N_2O_5}=2.NTK_N+5.NTK_O=2.14+5.16=108\left(đ.v.C\right)\\ PTK_{MgSO_4}=NTK_{Mg}+NTK_S+4.NTK_O=24+32+4.16=120\left(đ.v.C\right)\\ PTK_{Al_2\left(SO_4\right)_3}=2.NTK_{Al}+3.\left[NTK_S+3.4.NTK_O\right]\\ =2.27+3.\left(32+3.4.16\right)=342\left(đ.v.C\right)\\ PTK_{BaCO_3}=NTK_{Ba}+NTK_C+3.NTK_O=137+12+3.16=197\left(đ.v.C\right)\)