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Sagot :
Certainly! Let's predict the missing component for each reaction.
### Reaction 1:
[tex]\[ ? + 2 \text{NaBr} \rightarrow 2 \text{NaCl} + \text{Br}_2 \][/tex]
Here, we need to identify the reactant that, when combined with 2 NaBr, produces 2 NaCl and Br₂. Notice that Na is exchanging its partner from Br to Cl, and Br₂ is being formed as a product. The element that can facilitate this exchange while providing Cl atoms is Cl₂.
So, the complete reaction is:
[tex]\[ \text{Cl}_2 + 2 \text{NaBr} \rightarrow 2 \text{NaCl} + \text{Br}_2 \][/tex]
### Reaction 2:
[tex]\[ \text{CH}_4 + 2 \text{O}_2 \rightarrow ? \][/tex]
The combustion of methane (CH₄) in the presence of oxygen (O₂) typically yields carbon dioxide (CO₂) and water (H₂O).
So, the balanced reaction is:
[tex]\[ \text{CH}_4 + 2 \text{O}_2 \rightarrow \text{CO}_2 + 2 \text{H}_2 \text{O} \][/tex]
### Reaction 3:
Just given HCl
[tex]\[ ? \rightarrow \text{HCl} \][/tex]
Additional information is needed to predict the full reaction since it’s difficult to infer reactants and products with a single compound without any context.
### Reaction 4:
Just given CHO
[tex]\[ ? \rightarrow \text{CHO} \][/tex]
Since CHO can imply a partial product or a fragment of a compound (formaldehyde HCHO if we complete as a known compound), but with the given information, it is difficult to predict the full equation.
### Reaction 5:
Just given Cl₂
[tex]\[ ? \rightarrow \text{Cl}_2 \][/tex]
Similarly, predicting the complete reaction require more context to understand appropriate reactants and products.
### Reaction 6:
[tex]\[ \text{C}_2 \text{H}_2 + \text{CO}_2 \rightarrow ? \][/tex]
This reaction format suggests acetylene (C₂H₂) might be involved in a combustion reaction, but with CO₂ on the reactant side provides insufficient data for producing products since it typically might have H₂O and CO₂ as product but given CO₂ presence already anomalous.
### Reaction 7:
Just given Na
[tex]\[ ? \rightarrow \text{Na} \][/tex]
Again, predicting full reaction for elemental product Na would require context whether elemental sodium produced or part of another compound.
### Reaction 8:
[tex]\[ \text{CO}_2 + 2 \text{H}_2 \text{O} \rightarrow ? \][/tex]
Mixing of CO₂ and H₂O typically involved in producing oxygen but context missing for exact products without clear reaction process provided.
### Reaction 9:
Just given HBr
[tex]\[ ? \rightarrow \text{HBr} \][/tex]
Again, predicting the full reaction is challenging without more context or additional substances listed.
### Reaction 10:
[tex]\[ \text{C} + 2 \text{H}_2 \text{O} \rightarrow ? \][/tex]
Carbon reacting with water typically forms CO + H₂ in incomplete combustion scenario or water-gas shift reaction, full balanced equation consideration needed per context provided whether C fully oxidized or partial products.
In this manner, applying stoichiometric concepts balances chemical equations predicting missing reactants or products understanding standard chemical reactions principles.
### Reaction 1:
[tex]\[ ? + 2 \text{NaBr} \rightarrow 2 \text{NaCl} + \text{Br}_2 \][/tex]
Here, we need to identify the reactant that, when combined with 2 NaBr, produces 2 NaCl and Br₂. Notice that Na is exchanging its partner from Br to Cl, and Br₂ is being formed as a product. The element that can facilitate this exchange while providing Cl atoms is Cl₂.
So, the complete reaction is:
[tex]\[ \text{Cl}_2 + 2 \text{NaBr} \rightarrow 2 \text{NaCl} + \text{Br}_2 \][/tex]
### Reaction 2:
[tex]\[ \text{CH}_4 + 2 \text{O}_2 \rightarrow ? \][/tex]
The combustion of methane (CH₄) in the presence of oxygen (O₂) typically yields carbon dioxide (CO₂) and water (H₂O).
So, the balanced reaction is:
[tex]\[ \text{CH}_4 + 2 \text{O}_2 \rightarrow \text{CO}_2 + 2 \text{H}_2 \text{O} \][/tex]
### Reaction 3:
Just given HCl
[tex]\[ ? \rightarrow \text{HCl} \][/tex]
Additional information is needed to predict the full reaction since it’s difficult to infer reactants and products with a single compound without any context.
### Reaction 4:
Just given CHO
[tex]\[ ? \rightarrow \text{CHO} \][/tex]
Since CHO can imply a partial product or a fragment of a compound (formaldehyde HCHO if we complete as a known compound), but with the given information, it is difficult to predict the full equation.
### Reaction 5:
Just given Cl₂
[tex]\[ ? \rightarrow \text{Cl}_2 \][/tex]
Similarly, predicting the complete reaction require more context to understand appropriate reactants and products.
### Reaction 6:
[tex]\[ \text{C}_2 \text{H}_2 + \text{CO}_2 \rightarrow ? \][/tex]
This reaction format suggests acetylene (C₂H₂) might be involved in a combustion reaction, but with CO₂ on the reactant side provides insufficient data for producing products since it typically might have H₂O and CO₂ as product but given CO₂ presence already anomalous.
### Reaction 7:
Just given Na
[tex]\[ ? \rightarrow \text{Na} \][/tex]
Again, predicting full reaction for elemental product Na would require context whether elemental sodium produced or part of another compound.
### Reaction 8:
[tex]\[ \text{CO}_2 + 2 \text{H}_2 \text{O} \rightarrow ? \][/tex]
Mixing of CO₂ and H₂O typically involved in producing oxygen but context missing for exact products without clear reaction process provided.
### Reaction 9:
Just given HBr
[tex]\[ ? \rightarrow \text{HBr} \][/tex]
Again, predicting the full reaction is challenging without more context or additional substances listed.
### Reaction 10:
[tex]\[ \text{C} + 2 \text{H}_2 \text{O} \rightarrow ? \][/tex]
Carbon reacting with water typically forms CO + H₂ in incomplete combustion scenario or water-gas shift reaction, full balanced equation consideration needed per context provided whether C fully oxidized or partial products.
In this manner, applying stoichiometric concepts balances chemical equations predicting missing reactants or products understanding standard chemical reactions principles.
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