Question

# 3 grams of carbon is burnt completely in 8 gram of Oxygen and 11 gram of carbon dioxide is produced the mass of carbon dioxide formed when 9 gram of carbon burns in 50 gram of oxygen is

Solution

## C   +  O2 → CO2 3 g     8 g     11 g Total mass of reactants = mass of C + mass of O = 3+8 = 11g Total mass of reactants = total mass of products Hence, the law of conservation of mass is proved. Further, it also shows carbon dioxide contains carbon and oxygen in a fixed ratio by mass, which is 3 : 8. Thus it also proves the law of constant      proportions. 9 g of carbon must also combine with = 24 g of oxygen only. So carbon dioxide formed when 9 gram of carbon burns in 50 gram of oxygen is 24 + 9 = 33gChemistry

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