Few Important Questions

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in Ch 1 – Some Basic Concepts of Chemistry

Define mass and write its SI unit?
Calculate the number of atoms in 52 moles of Ar and 52 g of He.
What is the mass per cent of elements present in Na₂SO₄
What is the difference between 0.50 mol Na₂CO₃ and 0.50 M Na₂CO₃

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