When 35g of wood was burnt in air it combined with 32g of oxygen to obtain 2g of ash and - Science - Atoms and Molecules

Question

When 35g of wood was burnt in air it combined with 32g of oxygen to
obtain 2g of ash and a gas mixture of carbon dioxide and water
vapour Wgen the gas mixture was cooled 18g of water condensed how
much carbin dioxide was obtained

Vartika Jain · Accepted Answer

Dear Student,

Wood is composed of cellulose which is a polymer of glucose
 Therefore, let us take the reactant as glucose
 C6H12O6  +    6O2  →  Ash + 6CO2 + 6H2O Now, when the gas mixture is cooled 18 g of H2O is obtained, so mass of H2O is 18 gFrom equation, 6 mol i
e
 6×18 g of water is obtained frm 6 mol i
e
 6×32 g of O2So, 18 g of water will be obtained from  6×32  6×18×18=32 g of O2So, whole O2 is being consumed
 Now, 6×32 g of O2 gives 6×44 g of CO2So, 32 g of O2 will give  6×44 6×32×32=44 g of CO2

When 35g of wood was burnt in air it combined with 32g of oxygen to obtain 2g of ash and a gas mixture of carbon dioxide and water vapour. Wgen the gas mixture was cooled 18g of water condensed .how much carbin dioxide was obtained.