(a)
Interpretation: A chemical formula needs to be assigned to the compound in the cell.
Concept Introduction: According to the law of combining volume, the ratio of the volumes of pair of gases in a reaction at same temperature and pressure is the ratio of simple integers.
For example, 2 volume of H and 1 volume of O give 1 volume of water that is H2O.
Also, according to the Avogadro’s hypothesis, equal volume of different gases at same T and P has equal number of particles.
(b)
Interpretation: The reason for more than 1 formula possible in the answer to part (a) needs to be explained.
Concept Introduction: According to law of multiple compositions, two atoms of different elements can combine in more than one proportion to form different compounds.
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