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MayAnn1
@MayAnn1
October 2021
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помогите прощу . срочно надо
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Мураскимай
1) a)Fe + H₂SO₄ = FeSO₄ + H₂
FeSO₄ + 2NaOH = Fe(OH)₂ + Na₂SO₄
Fe(OH)₂ + 2HNO₃ = Fe(NO₃)₂ + H₂O
Fe(OH)₂ = FeO + H₂O
b) 4P + 5O₂ = 2P₂O₅
P₂O₅ + 3H₂O = 2H₃PO₄
H₃PO₄ + 3KOH = K₃PO₄ + 3H₂O
K₃PO₄ + 3AgNO₃ = 3KNO₃ + Ag₃PO₄
2) a) K = +1, O = -2, N = +5
b) H = +1, O = -2, S = +6
c) K = +1, S = +6, O = -2
3) a) K₂SO₄ = 174 г/моль
W(S) = 32/174 = 0,18 = 18%
b) n(CO₂) = 4.4/22,4 = 0,2 моль
v(CO₂) = 0,2 * 22,4 = 4,48 л
c) SO₃ + 2NaOH = Na₂SO₄ + H₂O
1. n(SO₃) = 5,6/22,4 = 0,25 моль
2. n(Na₂SO₄) = 0,25 моль
3. m(Na₂SO₄) = 0,25 * 142 = 35, 5 г
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MayAnn1
спасибо большое
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Answers & Comments
FeSO₄ + 2NaOH = Fe(OH)₂ + Na₂SO₄
Fe(OH)₂ + 2HNO₃ = Fe(NO₃)₂ + H₂O
Fe(OH)₂ = FeO + H₂O
b) 4P + 5O₂ = 2P₂O₅
P₂O₅ + 3H₂O = 2H₃PO₄
H₃PO₄ + 3KOH = K₃PO₄ + 3H₂O
K₃PO₄ + 3AgNO₃ = 3KNO₃ + Ag₃PO₄
2) a) K = +1, O = -2, N = +5
b) H = +1, O = -2, S = +6
c) K = +1, S = +6, O = -2
3) a) K₂SO₄ = 174 г/моль
W(S) = 32/174 = 0,18 = 18%
b) n(CO₂) = 4.4/22,4 = 0,2 моль
v(CO₂) = 0,2 * 22,4 = 4,48 л
c) SO₃ + 2NaOH = Na₂SO₄ + H₂O
1. n(SO₃) = 5,6/22,4 = 0,25 моль
2. n(Na₂SO₄) = 0,25 моль
3. m(Na₂SO₄) = 0,25 * 142 = 35, 5 г