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Question 4

Calculate the amount of carbon dioxide that could be produced when

 

(i) 1 mole of carbon is burnt in air.

 

(ii) 1 mole of carbon is burnt in 16 g of dioxygen.

 

(iii) 2 moles of carbon are burnt in 16 g of dioxygen.

Answer

The chemical equation for the reaction is:

 

 

i) when 1 mole of carbon is burnt in 1 mole(32 g) of air(dioxygen) ,then according to chemical equation (1) 1mole(44 g) of carbon dioxide is produced.

 

ii) 32g of Oxygen upon heating gives CO2 = 44g

1 g of Oxygen upon heating gives CO2 = 44/32

 

Therefore 16 g of Oxygen upon heating gives CO2 = 44/32*16 = 22 g

 

(iii) According to the question, only 16 g of dioxygen is available. It is a limiting reactant. Thus, 16 g of dioxygen can combine with only 0.5 mole of carbon to give 22 g of carbon dioxide.

 

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