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How is your dream model valid and where is it not valid?

Please help me and label them

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Related questions

Please help me what type of cloud iss?

3. An endothermic reaction can be expressed by writing the enthalpy term
A. as a negative value on the product side in the equation.
B. as a negative value in , H notation.
C. On the product side of an equation.
D. On the reactant side of an equation.

CHEMISTRY please help what are the answers to these three

Use the following information to answer the next three questions.
Scientists have proposed that the combustion of methane involves a four-step reaction pathway.
1.                                               
2.  
3.                                          
 
4.    
 
4. The enthalpy change for the reaction is
A. H = +427.5 kJ
B. H = +190.1 kJ
C. H = -427.5 kJ
D. H = -190.1 kJ
5. The intermediate products in the above reaction mechanism are
A.  
B.  
C.  
D.  
The overall reaction for the combustion of methane would require how many moles
A. mol
B. 1 mol
C. 2 mol
D. 4 mol

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