Question

calculate the amount of carbon dioxide formed when 50g of carbon is burnt in air.
(the atomic mass of elements C = 12 and O = 16 )

Answer 1

Hey Friend,

The reaction is - 

C + O2 ---> CO2 
1 mole of C + 1 mole of O2 ---> 1 mole of CO2

therefore, we can infer that
1 mole of Carbon gives 1 mole of Carbon dioxide
12 g of C ---> 44 g of CO2
50 g of C ---> (50 x 44) / 12
                       550 / 3
                      183.33 g of CO2

Therefore, when 50 g of C is burnt, then 183.33 g of CO2 is formed..

Hope it helps!