In a reaction, sodium carbonate reacts with ethanoic acid to produce sodium ethanoate, carbon dioxide,...
Atoms and molecule
Question Category: Atoms and molecule
Hydrogen and oxygen combine in the ratio of 1 :
It is given that the ratio of hydrogen and oxygen by mass to form water...
Which postulate of Dalton’s atomic theory is the result of
The postulate of Dalton’s atomic theory which is a result of the law of conservation...
Which postulate of Dalton’s atomic theory can explain the law
The postulate of Dalton’s atomic theory which can explain the law of definite proportion is...
Define atomic mass unit.
Mass unit equal to exactly one- twelfth the mass of one atom of carbon –...
Why is it not possible to see an atom with
The size of an atom is so small that it is not possible to see...
Write down the formula of (i) sodium oxide (ii) aluminium
(i) Sodium oxide → Na2O (ii) Aluminium chloride → AlCl3 (iii) Sodium sulphide → Na2S...
Write down the names of compounds represented by the following
(i) Al(SO4)3→ Aluminium sulphate (ii) CaCl2→ Calcium chloride (iii) K2SO4→ Potassium sulphate (iv) CaCO3→ Calcium...
What is meant by the term chemical formula?
The chemical formula of a compound means the symbolic representation of the composition of a...
How many atoms are present in a (i) H2S molecule
(i) In an H2S molecule, three atoms are present; two of hydrogen and one of...