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JEE Main Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main

The atomic weight of metal M is 56 u and its oxide contains 70% of M. The number of O atoms in the empirical formula of this metal oxide is.

Answer: 3

Solution

Mass ratio M : O . Moles M ; moles O . Dividing by 1.25:

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Question ID VK-131157