Which postulate of Dalton’s atomic theory is result of law of conservation of mass ?

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3. ATOMS AND MOLECULES

easy

Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass ?

Option A

Option B

Option C

Option D

Solution

Following postulate of Dalton's atomic theory is the result of the law of conservation of mass. 'Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.'

Standard 9

Science

Calculate the number of aluminium ions present in $0.051\,g$ of aluminium oxide.

[HintThe mass of an ion is the same as that of an atom of the same element. Atomic mass of $Al=27\,\mu $.]

hard

Calculate the molecular masses of $H_2$, $O_2$ and $Cl_2$.

easy

Write the chemical formulae of the following.

$(i)$ Magnesium chloridea

$(ii)$ Calcium oxide

$(iii)$ Copper nitrate

$(iv)$ Aluminium chloridea

$(v)$ Calcium carbonate.

medium

Why is it not possible to see an atom with naked eyes ?

easy

What is the mass of :

$(a)$ $0.2$ mole of oxygen atoms ?

$(b)$ $0.5$ mole of water molecules ?

medium

Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass ?

Solution

Similar Questions

Calculate the number of aluminium ions present in $0.051\,g$ of aluminium oxide. [HintThe mass of an ion is the same as that of an atom of the same element. Atomic mass of $Al=27\,\mu $.]

Calculate the molecular masses of $H_2$, $O_2$ and $Cl_2$.

Write the chemical formulae of the following. $(i)$ Magnesium chloridea $(ii)$ Calcium oxide $(iii)$ Copper nitrate $(iv)$ Aluminium chloridea $(v)$ Calcium carbonate.

Why is it not possible to see an atom with naked eyes ?

What is the mass of : $(a)$ $0.2$ mole of oxygen atoms ? $(b)$ $0.5$ mole of water molecules ?

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Calculate the number of aluminium ions present in $0.051\,g$ of aluminium oxide.

[HintThe mass of an ion is the same as that of an atom of the same element. Atomic mass of $Al=27\,\mu $.]

Write the chemical formulae of the following.

$(i)$ Magnesium chloridea

$(ii)$ Calcium oxide

$(iii)$ Copper nitrate

$(iv)$ Aluminium chloridea

$(v)$ Calcium carbonate.

What is the mass of :

$(a)$ $0.2$ mole of oxygen atoms ?

$(b)$ $0.5$ mole of water molecules ?