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ivashkoaleksei
@ivashkoaleksei
August 2021
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Подсчитайте число атомов в следующих молекулах :(NH4)3PO4, Ca(HCO3)2, [Fe(OH)2]2SO4.
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dec77cat
(NH₄)₃PO₄
N-3
H-3*4=12
P-1
O-4
Σ=3+12+1+4=20
Ca(HCO₃)₂
Ca-1
H-2
C-2
O-3*2=6
Σ=1+2+2+6=11
[Fe(OH)₂]₂SO₄
Fe-2
O-2*2+4=8
H-2*2=4
S-1
Σ=2+8+4+1=15
5 votes
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Answers & Comments
N-3
H-3*4=12
P-1
O-4
Σ=3+12+1+4=20
Ca(HCO₃)₂
Ca-1
H-2
C-2
O-3*2=6
Σ=1+2+2+6=11
[Fe(OH)₂]₂SO₄
Fe-2
O-2*2+4=8
H-2*2=4
S-1
Σ=2+8+4+1=15