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A l 2 O 3 (M = 27.2 + 16.3 = 102 đvC )
A l 2 ( S O 4 ) 3 (M = 342 đvC ) F e ( N O 3 ) 3 ( M = 242 đvC )
N a 3 P O 4 (M = 164 đvC ) C a ( H 2 P O 4 ) 2 ( M = 234 đvC )
B a 3 ( P O 4 ) 2 (M = 601 đvC ) Z n S O 4 ( M = 161 đvC )
AgCl (M = 143,5 đvC ) NaBr ( M = 103 đvC )
\(1,\left\{{}\begin{matrix}p=e\\n+p+e=40\\2p-n=12\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2p+n=40\\2p-n=12\end{matrix}\right.\Leftrightarrow n=\dfrac{40-12}{2}=14\)
\(2,PTK_{Al_2O_3}=2\cdot27+16\cdot3=102\left(đvC\right)\\ PTK_{Al_2\left(SO_4\right)_3}=2\cdot27+\left(32+16\cdot4\right)\cdot3=342\left(đvC\right)\\ PTK_{Fe\left(NO_3\right)_3}=56+\left(14+16\cdot3\right)\cdot3=242\left(đvV\right)\\ PTK_{Na_3PO_4}=23\cdot3+31+16\cdot4=164\left(đvC\right)\\ PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(2+31+16\cdot4\right)\cdot2=234\left(đvC\right)\\ PTK_{Ba_3PO_4}=137\cdot3+31+16\cdot4=506\left(đvC\right)\\ PTK_{ZnSO_4}=65+32+16\cdot4=161\left(đvC\right)\\ PTK_{AgCl}=108+35,5=143,5\left(đvC\right)\\ PTK_{NaBr}=23+80=103\left(đvC\right)\)
Câu 1:
O: 6 e ngoài cùng
N: 4 e ngoài cùng
K:1 e ngoài cùng
P: 5 e ngoài cùng
Câu 2:
\(PTK_{Al_2O_3}=2.27+16.3=102\left(đVc\right)\)
Al2(SO4)3=27.2+3.(32+16.4)=342(đVc)
\(Fe\left(NO_3\right)_3=56+3.\left(14+16.3\right)=242\left(đVc\right)\)
\(Na_3PO_4=23.3+31+16.4=164\left(đVc\right)\)
\(Ca\left(H_2PO_4\right)_2=40+2.\left(1.2+31+16.4\right)=234\left(đVc\right)\)
\(Ba_3\left(PO_4\right)_2=137.3+2.\left(31+16.4\right)=601\left(đVc\right)\)
\(ZnSO_4=65+32+16.4=161\left(đVc\right)\)
\(AgCl=108+35,5=143,5\left(đVc\right)\)
\(NaBr=23+80=103\left(đVc\right)\)
\(PTK_{Mg\left(OH\right)_2}=24+\left(16+1\right).2=58\left(đvC\right)\)
\(PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(1.2+31+16.4\right).2=234\left(đvC\right)\)
\(PTK_{Ba_3\left(PO_4\right)_2}=137.3+\left(31+16.4\right).2=601\left(đvC\right)\)
\(PTK_{Al_2\left(SO_4\right)_3}=27.2+\left(32+16.4\right).3=342\left(đvC\right)\)
\(PTK_{Ca\left(HCO_3\right)_2}=40+\left(1+12+16.3\right).2=162\left(đvC\right)\)
\(PTK_{Fe\left(NO_3\right)_2}=56+\left(14+16.3\right).2=180\left(đvC\right)\)
\(PTK_{Mg\left(OH\right)_2}=24+\left(16+1\right)\cdot2=58\left(đvC\right)\\ PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(2+31+16\cdot4\right)\cdot2=234\left(đvC\right)\\ PTK_{Ba_3\left(PO_4\right)_2}=137\cdot3+\left(31+16\cdot4\right)\cdot2=601\left(đvC\right)\\ PTK_{Al_2\left(SO_4\right)_3}=27\cdot2+\left(32+16\cdot4\right)\cdot3=342\left(đvC\right)\\ PTK_{Ca\left(HCO_3\right)_2}=40+\left(1+12+16\cdot3\right)\cdot2=162\left(đvC\right)\\ PTK_{Fe\left(NO_3\right)_2}=56+\left(14+16\cdot3\right)\cdot2=180\left(đvC\right)\)
\(a) n_{Zn(NO_3)_2} = \dfrac{37,8}{189} = 0,2(mol)\\ n_{Zn} = 0,2\ mol \to m_{Zn} = 0,2.65 = 13\ gam\\ n_N = 0,2.2 = 0,4\ mol \to m_N = 0,4.14 = 5,6\ gam\\ m_O = 37,5 - 13 - 5,6 = 18,9(gam)\\ b)n_{Fe_3(PO_4)_2} = \dfrac{10,74}{358} = 0,03(moL)\\ n_{Fe} = 0,03.3 = 0,09 \to m_{Fe} = 0,09.56 = 5,04(gam)\\ n_P = 0,03.2 = 0,06 \to m_P = 0,06.31 = 1,86(gam)\\ m_O = 10,74 - 5,04 -1,86 = 3,84(gam)\\ c) n_{Al} = 0,2.2 = 0,4(mol\to m_{Al} = 0,4.27 = 10,8(gam)\\ n_S = 0,2.3 = 0,6 \to m_S = 0,6.32 = 19,2(gam)\\ n_O = 0,2.12 = 2,4 \to m_O = 2,4.16 = 38,4(gam)\)
\(d) n_{Zn(NO_3)_2} = \dfrac{6.10^{20}}{6.10^{23}} = 0,001(mol)\\ n_{Zn} = 0,001 \to m_{Zn} = 0,001.65 = 0,065(gam)\\ n_N = 0,001.2 = 0,002 \to m_N = 0,002.14 = 0,028(gam)\\ n_O = 0,001.6 = 0,006 \to m_O = 0,006.16= 0,096(gam)\)
Theo gt ta có: $n_{Zn(NO_3)_2}=0,2(mol);n_{Fe_3(PO_4)_2}=0,03(mol);n_{Zn(NO_3)_2}=1(mol)$
a, $m_{Zn}=13(g);m_{N}=5,6(g);m_{O}=19,2(g)$
b, $m_{Fe}=5,04(g);m_{P}=1,86(g)$;m_{O}=3,84(g)$
c, $m_{Al}=10,8(g);m_{S}=19,2(g);m_{O}=38,4(g)$
d, $m_{Zn}=65(g);m_{N}=28(g);m_{O}=96(g)$
1. \(2Al+3Fe\left(NO_3\right)_2\rightarrow2Al\left(NO_3\right)_3+3Fe\)
2. \(P_2O_5+3Ba\left(OH\right)_2\rightarrow Ba_3\left(PO_4\right)_2+3H_2O\)
3. \(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)
4. \(Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2\rightarrow3CaSO_4+2Al\left(OH\right)_3\)
5. \(Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)
6. \(Mg\left(NO_3\right)_2\underrightarrow{t^o}MgO+2NO_2+\dfrac{1}{2}O_2\)
7. \(2xFe+yO_2\underrightarrow{t^o}2Fe_xO_y\)
8. \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
9. \(C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
Bạn tham khảo nhé!
\(1.Al+Fe\left(NO_3\right)_2--->Al\left(NO_3\right)_2+Fe\)
\(2.P_2O_5+3Ba\left(OH\right)_2--->Ba_3\left(PO_4\right)_2+3H_2O\)
\(3.Al\left(OH\right)_3+3HCl--->AlCl_3+3H_2O\)
\(4.Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2--->3CaSO_4+2Al\left(OH\right)_3\downarrow\)
\(5.Fe_3O_4+8HCl--->FeCl_2+2FeCl_3+4H_2O\)
\(6.2Mg\left(NO_3\right)_2\overset{t^o}{--->}2MgO+4NO_2+O_2\)
\(7.xFe+\dfrac{y}{2}O_2\overset{t^o}{--->}Fe_xO_y\)
\(8.CH_4+2O_2\overset{t^o}{--->}CO_2+2H_2O\)
\(9.C_2H_6O+3O_2\overset{t^o}{--->}2CO_2+3H_2O\)
Phân tử khối
Al2O3= 27.2 + 16.3 = 102 (đvC)
Al2(SO4)3 = 27.2 +(32.3 + 16.4.3) =54.(96+192)= 54+288= 342 (đvC)
Fe(NO3)3= 56 +(14.3+16.3.3)= 56+ 42+144=242 (đvC)
Na3PO4= 23.3+31+16.4= 164 ( đvC)
Ca(H2PO4)2= 40+ (1.2.2+31.2+16.4.2)=234 ( đvC)
Ba3(PO4)= 137 . 3 + 31+16.4= 601 ( đvC)
ZnSO4= 65+32+16.4= 161 ( đvC)
AgCl = 108+35,5= 143,5( đvC)
NaBr= 23 + 80 = 103 ( đvC)
PTK (Al2O3) = 27.2 + 16.3 = 102 đvC
PTK (Al2(SO4)3) = 27.2 + 32.3 + 16.4.3 = 342 đvC
PTK (Na3PO4) = 23.3 + 31 + 16.4 = 164 đvC
PTK (Ca(H2PO4)2) = 40 + 2.2 + 31.2 + 16.4.2 = 234 đvC
PTK (Ba3(PO4)2) = 137.3 + 31.2 + 16.4.2 = 601 đvC
PTK (ZnSO4) = 65 + 32 + 16.4 = 161 đvC
PTK (AgCl) = 108 + 35,5 = 143,5 đvC
PTK (NaBr) = 23 + 80 = 103 đvC