Question

1. ?+?=Ba (NO3)2 + H2O 2. ?+?= SO2 3. ?+?=CaCO3 4. ?+?=H3PO4 5.?+?=Ca(OH)2

Answer 1

Ответ:

Объяснение:

Ba(OH)2 + 2HNO3 = Ba(NO3)2 + 2H2O

S + O2 = SO2

CaO + CO2 = CaCO3

P2O5 + 3H2O = 2H3PO4

CaO + H2O = Ca(OH)2

Answer 2

Ответ:

1) HNO3 + BaO = Ba (NO3)2 + H2O2

2)CaO + CO2 = CaCO3

3) P4O10 + 6H2O = H3PO4

4)CaO + H2O=Ca(OH)2

Объяснение

Answer 3

It seems like you're providing chemical equations and asking for the missing reactants or products. Let's balance the equations and identify the missing substances:

1. ? + ? = Ba(NO3)2 + H2O The reaction seems incomplete, and there is no balanced equation here.

2. ? + ? = SO2 This equation is also incomplete, and there is no balanced equation provided.

3. ? + ? = CaCO3 The balanced equation would be: CaO + CO2 = CaCO3 This equation represents the thermal decomposition of calcium carbonate to form calcium oxide and carbon dioxide.

4. ? + ? = H3PO4 The balanced equation would be: 3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 6H2O This equation represents the reaction between calcium hydroxide and phosphoric acid to form calcium phosphate and water.

5. ? + ? = Ca(OH)2 The balanced equation would be: CaO + H2O = Ca(OH)2 This equation represents the reaction of calcium oxide with water to form calcium hydroxide.

Please note that chemical equations need to be properly balanced, and missing reactants or products can be identified by ensuring that the number of atoms of each element is the same on both sides of the equation. If you have more specific information or context for the reactions, feel free to provide it for a more accurate response.