Respuesta :

Answer:  The "conversion factor" is:
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"   1000 mL "  
       1 L    
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Explanation:
Note the exact values:  1 L = 1000 mL

                           and:  1000 mL = 1 L .

{Note:  " L = liter(s) " ;  and:  " mL = millileter(s) ".}.

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35 L * 1000 mL  
            1 L           ;

We cancel out the 2 (two):  " L " ["Liters"] ; since:  [" L ÷ L = 1 "].

Then we can convert the value—into units of "mL" ;

 →  35 * (1000 mL) = (35 * 1000) mL =  35,000 mL.

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Note that the question asks for the:

"conversion value needed to convert [35 L into mL] ;

By using the technique shown above; known as "dimensional analysis, we use that particular conversion faction—of a manner in which one multiplies by a "fraction";  so that:  
  1) the correct units for the particular value one is seeking that can be obtained—and in which the values, or more relevantly, the units —that are "not needed" can be "canceled out" ; and:
 2) The problem can be solved.
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Note:  The above information is just information that provides an explanation of the concepts surrounding the "actual answer"—of this very question."

The actual answer to this Brainly question:
 As shown above:
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The 'conversion factor is:
"  
1000 mL "  
       1 L      

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Hope this lengthy explanation—and answer—are helpful.
Best wishes!