Advertisements
Advertisements
Question
Which postulate of Dalton's atomic theory is the result of law of conservation of mass given by Lavoisier ?
Solution
The postulate of Dalton's atomic theory, which is the result of the law of conservation of mass proposed by Lavoisier, states that, “Atoms can neither be created nor destroyed.”
APPEARS IN
RELATED QUESTIONS
Name the scientist who gave atomic theory of matter.
Give one major drawback of Dalton's atomic theory of matter.
State the law of constant proportions. Give one example to illustrate this law.
When 5 g of calcium is burnt in 2 g of oxygen, then 7 g of calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium is burnt in 20 g of oxygen ? Which law of chemical combination will govern your answer ?
What do we call those particles which have more or less electrons than the normal atoms ?
What do we call those particles which are formed by the loss of electrons by atoms ?
Work out the formulae for the following compounds :
Sodium oxide
Work out the formulae for the following compounds:
Calcium carbonate
Two samples ‘m’ and ‘n’ of slaked lime were obtained from two different reactions. The details about their composition are as follows:
- ‘sample m’ mass: 7g
- Mass of constituent oxygen: 2g
- Mass of constituent calcium: 5g
- ‘sample n’ mass: 1.4g
- Mass of constituent oxygen: 0.4g
- Mass of constituent calcium: 1.0g
Which law of chemical combination does this prove? Explain.
Ruthresh, Hari, Kanishka, and Thahera collected different samples of water from a well, a pond, a river, and underground water. All these samples were sent to a testing laboratory. The test result showed the ratio of hydrogen to oxygen as 1:8.
- What conclusion would you draw from the above experiment?
- Which law of chemical combination does it obey?