Dear student,

First in these combustion type of questions always write the reaction that what is the chemical reaction. And for that your must note that combustion always take place in presence of Oxygen ( i.e, O2 ).
And also note that always write the balanced equation, so do not start solving these combustion type problems just by skeletal equation ( non balanced equation).

So, in the question it is given that 1 mole of carbon is burnt in air. Now as carbon is burnt so, it will give carbon dioxide ( i.e, CO2 )

So,

C + O2 = CO2

Now as nothing is given then we will assume that carbon is burnt completely. That means all the oxygen is used and all the carbon is converted to carbon dioxide leaving no oxygen behind.

So, after burning all the carbon will be converted to CO2. So, after burning CO2 will also be produced 1 mole.

So, 1 mole of C produces 1 mole of CO2. So, 1 mole of CO2 corresponds to 44 grams.

So, 44 grams will be produced after burning 1 mole lf CARBON.


So, in combustion type problem always first write equation and then proceed as there are many variations are also possible in combustion problems.