Advertisements
Advertisements
Question
State the ‘law of conservation of mass’.
Advertisements
Solution
Law of Conservation of Mass: “In any chemical reaction, the total mass of the reacting substances is equal to the total mass of the products of the reaction provided masses are measured under similar conditions.”
APPEARS IN
RELATED QUESTIONS
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.
Sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water
Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
State the law of conversation of mass.
What is mass ?
If an object weighs 6 kg on earth. What will be its weight on moon ?
Give reason for the following.
Electricity is not considered matter.
State the law of conservation of mass.
Name the scientist who gave law of conservation of mass.
Name the law of chemical combination which was given by Proust.
State the law of conservation of mass. Give one example to illustrate this law.
Which postulate of Dalton's atomic theory can explain the law of conservation of mass ?
The law of conservation of mass was given by :
Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium
sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form
9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data ? Give reason for your choice.
Complete the statement given below by filling in the blanks with the correct words.
Atoms contain ________ with positively charged ________.
Match the following.
| Law of conservation of mass | Sir William Crookes |
| Law of constant proportion | James Chadwick |
| Cathode rays | Joseph Proust |
| Anode rays | Lavoisier |
| Neutrons | Goldstein |
Why does a light paddle wheel placed in the path of cathode rays begin to rotate, when cathode rays fall on it?
The chemical symbol for nitrogen gas is ______.
Name the four laws of chemical combinations.
