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 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 Science
What 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 - Science
Which postulate of Dalton’s atomic theory can explain the law of constant proportions?Lakhmir Singh & Manjit Kaur - Chemistry
A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas Y is produced at the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y supports combustion whereas gas Z burns itself causing explosions.
(a) Name (i) liquid X (ii) gas Y, and (iii) gas Z
(b) What is the ratio to the mass of element Z to the mass of element Y in the liquid X?
(c) Which law of chemical combination is illustrated by this example?
(d) Name two sources of liquid X.
(e) State an important use of Y in our life.Lakhmir Singh & Manjit Kaur - Chemistry
One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence are produced. When 50 g of reactant P was heated strongly, than 22 g of a gas Q and 28 g of a solid R were produced as products. Gas Q is the same which produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for white-washing.
(a) What is (i) solid P (ii) gas Q, and (iii) solid R.
(b) What is the total mass of Q and R obtained from 50 g of P?
(c) How does the total mass of Q and R formed compare with the mass of P taken?
(d) What conclusion do you get from the comparison of masses of products and reactant?
(e) Which law of chemical combination is illustrated by the example given in this problem?Lakhmir Singh & Manjit Kaur - Chemistry
During an experiment hydrogen (H2) and oxygen (O2) gases reacted in an electric are to produce water as
follows: 2H + O2 2H2O
The experiment is repeated three times and data tabulated as shown below:
During 3rd experiment the researcher forgot to list masses of H2 and O2 used. So, if the law of constant proportion is correct then find mass of O2 used during 3rd experiment.All In One - Science
In a compound such as water, the ratio of the mass of hydrogen to the mass of oxygen is always:Evergreen - Science
Four students A, B, C and D verified the law of conservation of mass by performing chemical reaction between barium chloride and sodium sulphate. All of them took 107.2 g barium chloride solution and 116.1g of sodium sulphate solution and mixed them in the beaker of mass 150 g. They reported their results as follows:
The correct observation is that of student.All In One - Science