Question

Расставьте коэффициенты. Укажите тип реакции. HgO=Hg +O2; CaO+ H2O= Ca(OH)2; (NH4)2Cr2O7=Cr2O3+N2+H2O; H2O+B2O3=H3BO3; P2O5+H2O=H3PO4; CaO+ P2O5= Ca3(PO4)2 Al+ FeO= Al2O3 + Fe; Cl2O7+H2O= HClO4.

Answer 1

Ответ:

Объяснение:

2HgO = 2Hg + O2 (разложение)

CaO + H2O = Ca(OH)2 (соединение)

(NH4)2Cr2O7 = Cr2O3 + N2 + 4H2O (разложение)

3H2O + B2O3 = 2H3BO3 (соединение)

P2O5 + 3H2O = 2H3PO4 (соединение)

3CaO + P2O5 = Ca3(PO4)2 (соединение)

2Al + 3FeO = Al2O3 + 3Fe (замещение)

Cl2O7 + H2O = 2HClO4 (соединение)

Answer 2

HgO = Hg + O2; (HgO - 1 Hg) (1 Hg - 1 Hg) (1 O - 1 O)

Type of reaction: Decomposition

CaO + H2O = Ca(OH)2; (CaO - 1 Ca) (1 Ca - 1 Ca) (1 O - 2 H) (1 H2O - 1 H2O)

Type of reaction: Combination

(NH4)2Cr2O7 = Cr2O3 + N2 + H2O; (NH4)2Cr2O7 - 1 (Cr2O3 - 1 N2 - 4 H2O)

Type of reaction: Decomposition

H2O + B2O3 = H3BO3; (H2O - 3 H3BO3 - 1 B2O3)

Type of reaction: Combination

P2O5 + H2O = H3PO4; (P2O5 - 1 H3PO4 - 1 H2O)

Type of reaction: Combination

CaO + P2O5 = Ca3(PO4)2; (CaO - 3 Ca3(PO4)2) (P2O5 - 2 Ca3(PO4)2)

Type of reaction: Combination

Al + FeO = Al2O3 + Fe; (Al - 2 Al2O3 - 3 Fe)

Type of reaction: Displacement

Cl2O7 + H2O = HClO4; (Cl2O7 - 2 HClO4 - 1 H2O)

Type of reaction: Combination