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JEE Main Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main

A person has as many notes as the number of oxygen atoms in 24.8 g NaSOHO (mol. wt. = 248.0). A note-counting machine counts 60 million notes per day. How many days would be taken to count these notes?

Answer: (C)

Solution

Moles mol. Each formula unit has O atoms, so moles O , giving

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Question ID VK-130895