Stoichiometry
A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is

N₂O₄
None of these
N₂O₅
N₂O₃

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Stoichiometry
Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Attractive forces between like and unlike molecules are approximately equal
Sizes of the component molecules are approximately equal
All of these
Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution

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