Объяснение:
P(V)O(II)
C(IV)O(II)
Ca(II)C(IV)O(II)
H(I)Si(IV)O(II)
Mr(P2O5)=31*2+16*5=142
Mr(CO2)=12+16*2=44
Mr(CaCO3)=40+12+16*3=100
Mr(H2SiO3)=1*2+28+16*3=78
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Объяснение:
P(V)O(II)
C(IV)O(II)
Ca(II)C(IV)O(II)
H(I)Si(IV)O(II)
Mr(P2O5)=31*2+16*5=142
Mr(CO2)=12+16*2=44
Mr(CaCO3)=40+12+16*3=100
Mr(H2SiO3)=1*2+28+16*3=78