Q. 23.8( 226 Votes )
When 3.0 g of carbon is burnt in 8.00 g of oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combination will govern your answer?
Answer :
Answer will be governed by the law of constant proportions which states that the mass of reactant must be equal to the mass of the product formed during a reaction
Now, since carbon and oxygen combine in the fixed proportion of 3 : 8 by mass to produce 11 g of carbon dioxide,
3 + 8 = 11 (by ratio proportion)
According to the question, the equation formed will be:-
3 + 50 = 11 + 42
53 = 53
Therefore, the same mass of carbon dioxide (11 g) will be obtained even if we burn 3 g of carbon in 50 g of oxygen.
The extra oxygen (50 – 8 = 42 g oxygen) will remain unchanged.
Rate this question :






















With the help of example, explain the law of conservation of mass.
Together with ScienceWhat is meant by the law of conservation of mass? If 12 g of C is burnt in the presence of O2, how much CO2 will be formed?
[Atomic mass of C = 12 u, O = 16 u]
Together with Science
20g silver nitrate solution is added to 20g of sodium chloride solution. What change in mass do you expect after the reaction and why?
All In One - ScienceWhich postulate of Dalton’s atomic theory can explain the law of constant proportions?
Lakhmir Singh & Manjit Kaur - Chemistry