$(a)$ What is the law of constant proportions? Explain with the help of an example.
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?
(N/A) The law of constant proportions states that in a chemical substance, the elements are always present in definite proportions by mass.
Example: In water $(H_2O)$, the ratio of the mass of hydrogen to the mass of oxygen is always $1:8$, regardless of the source of water.
$(b)$ The postulate of Dalton's atomic theory that is in agreement with this law is: "The relative number and kinds of atoms are constant in a given compound."
Example: In water $(H_2O)$, the ratio of the mass of hydrogen to the mass of oxygen is always $1:8$, regardless of the source of water.
$(b)$ The postulate of Dalton's atomic theory that is in agreement with this law is: "The relative number and kinds of atoms are constant in a given compound."
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