Answer: it's 3CO2+4H2O+Energy
Propane is a linear alkane of formula C3H8. It is mainly used as fuel (this is the main component of liquefied petroleum gas) in cooking and chemical industry reactions. 
The reaction of its complete combustion by the presence of oxygen is:
C3H8 (gas) + 5O2  ==> 3 CO2 + 4H2O + energy (2220⋅kJ)
As we can see, propane can release carbon dioxide and water as every combustion reaction, and a lot of energy in the form of heat.
 
        
             
        
        
        
Circle should be on number 13 because three chromosomes means that there’s a disability or abnormality.
Plz mark as brainleast plzzz :)
        
             
        
        
        
5 g is the answer.If this is not a nuclear reaction.
        
             
        
        
        
Microorganisms are used in making of bread, tooth paste, dough, pizza etc. they are even used in making vaccines antibiotics. only some microorganisms are harmful