Chemistry Some Basic Concepts of Chemistry Percentage Composition & Molecular Formula Single Correct MCQ
Published on: August 13, 2026

0.75 mole of solid 'A 4 ' and 2 moles of gaseous O 2 are heated in a sealed vessel, completely using up the reactants and producing only one compound. It is found that when the temperature is reduced to the initial temperature, the contents of the vessel exhibit a pressure equal to half the original pressure. What conclusions can be drawn from these data about the product of the reaction?

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The correct answer is:
A

(A 3 O 4)

Applying POAC law for A atoms,

Applying POAC for atoms,

Thus, the formula of the product is .

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