1: M(Na3PO4) = 23*3+31+16*4=164
M(SO2) = 32+16*2=64
M(4Fe(OH)2)=4*(56+16*2+1*2)= 360
2: a) Mg -> p -> Cl
b) Be -> Mg -> Ca
3: PCl3 : ковалентная полярная связь
O2 : ковалентная неполярная связь
СaCl2 : ионная связь
4: n(39K) = 780 p(39K) = 741
n(40k) = 800 p(40K) = 760
n(24Mg) = 288 p(24K) = 288
n(69Zn) = 2415 p(69Zn) = 2070
n(12C) = 72 p(12C) = 72
n(11B) = 66 p(11B) = 55
5: Na - 11 номер, 11е, 11р, 12n
формула - 1s²2s²2p⁶3s¹
6: M(вещества) = 27*2 + 32*3 = 150
w(s) = 32*3/150*100%= 64%
ответ:https://tex.z-dn.net/?f=1)%20SO_3%2BH_2O%3DH_2SO_4%5C%5C2K%2B2H_2O%3D2KOH%2BH_2%5C%5CK_2O%2BH_2O%3D2KOH%5C%5C2)2K%2B2HCl%3D2KCl%2BH_2%5C%5CFeO%2B2HCl%3DFeCl_2%2BH_2O%5C%5CK_2O%2B2HCl%3D2KCl%2BH_2O
Объяснение:
https://tex.z-dn.net/?f=3)2NaOH%2BSO_3%3DNa_2SO_4%2BH_2O%5C%5CNaOH%2BHNO_3%3DNaNO_3%2BH_2O%5C%5C3NaOH%2BAl(OH)_3%3DNa_3AlO_3%2B3H_2O%5C%5C4)2KOH%2BSO_3%3DK_2SO_4%2BH_2O%5C%5CKOH%2BHNO_3%3DKNO_3%2BH_2O%5C%5C3KOH%2BAl(OH)_3%3DK_3AlO_3%2B3H_2O%5C%5C2Al(OH)_3%2B3SO_3%3DAl_2(SO_4)_3%2B3H_2O%5C%5C2HNO_3%2BFeO%3DFe(NO_3)_2%2BH_2O%5C%5C8HNO_3%2BCu%3D3Cu(NO_3)_2%2B2NO%2B4H_2O%5C%5C3HNO_3%2BAl(OH)_3%3DAl(NO_3)_3%2B3H_2O%5C%5C2HNO_3%2BK_2O%3D2KNO_3%2BH_2O%5C%5CNa_2SO_4%2B2HNO_3%3D2NaNO_3%2BH_2SO_4
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