Объяснение:
1.
SO₃
Mr(SO₃)=Ar(S)+3Ar(O)=32+3x16=32+48=80
ω(S)=Ar(S)÷Mr(SO₃)=32÷80=0.4 ω%(S)=ω(S)×100%=0.4×100%=40%
ω(O)=3Ar(O)÷Mr(SO₃)=48÷80=0.6 ω%(O)=ω(O)×100%=0.6×100%=60%
2.
SiO₂+4HF=SiF₄+2H₂O
2KClO₃=2KCl+2O₂
2Fe(OH)₃=Fe₂O₃+3H₂O
6HBr+Al₂O₃=2AlBr₃+3H₂O
Объяснение:
1.
SO₃
Mr(SO₃)=Ar(S)+3Ar(O)=32+3x16=32+48=80
ω(S)=Ar(S)÷Mr(SO₃)=32÷80=0.4 ω%(S)=ω(S)×100%=0.4×100%=40%
ω(O)=3Ar(O)÷Mr(SO₃)=48÷80=0.6 ω%(O)=ω(O)×100%=0.6×100%=60%
2.
SiO₂+4HF=SiF₄+2H₂O
2KClO₃=2KCl+2O₂
2Fe(OH)₃=Fe₂O₃+3H₂O
6HBr+Al₂O₃=2AlBr₃+3H₂O