Q.
Calculate the amount of CO2(g) produced by combustion of 32g of oxygen.
2517
194
Some Basic Concepts of Chemistry
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Solution:
32g of O2 corresponds to one mole. Here we want 2 moles of oxygen to form 1 mole of CO2. 1mole of CO2=12+2(16)=12+32=44g 1mole of CO2=44gCO2⇒1moleCO244gCO2
Here 2moles of O2 gives 1mole of CO2. 1mole of O2 gives 1/2mole of CO2
Hence 1/2 mole of CO2⇒21×44gCO2=22gCO2 22g of CO2 is evolved when 32gO2 is heated.