Đáp án:
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Giải thích các bước giải:
a) BaO: PTK=137+16=153đvC
CaO: PTK=40+16=56đvC
Na2O: PTK=23.2+16=62đvC
K2O: PTK=39.2+16=94đvC
MgO: PTK=24+16=40đvC
b) SO2: PTK=32+16.2=64đvC
SO3: PTK=32+16.3=80đvC
CO2: PTK=12+16.2=44đvC
P2O5: PTK=31.2+16.5=142đvC
N2O5: PTK=14.2+16.5=108đvC
c) CuCl2:PTK=64+35,5.2=135đvC
FeCl2: PTK=56+35,5.2=127đvC
FeCl3:PTK=56+35,5.3=162,5đvC
NaCl:PTK=23+35,5=58,5đvC
MgCl2: PTK=24+35,5.2=95đvC