Blocks on the periodic table will not list a mass number of elements in this scenario.
<h3>What is Periodic table?</h3>
This table comprises of elements in order of their atomic number which determines their chemical properties.
It contains the atomic number but however doesn't contain the mass number of the elements.
Read more about Periodic table here brainly.com/question/15987580
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Answer : The correct option is (c) 
Explanation :
The given balanced chemical reaction is,

From the balanced chemical reaction, we conclude that
As, 3 moles of  react to give 2 mole of
 react to give 2 mole of 
So, 1 mole of  react to give
 react to give  moles of
 moles of 
Thus, the conversion factor needed to convert the number of moles of  to the number of moles of
 to the number of moles of  produced is
 produced is 
Hence, the correct option is (c) 