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Atoms and Molecules (Class 9)
Laws of chemical combination, atomic and molecular mass, mole concept, formula writing.
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Take a full mock →Q1 · Atoms and Molecules (Class 9) · MEDIUM
How many moles of oxygen atoms are present in 88 g of carbon dioxide (CO₂)? (Given: Atomic mass of C = 12 u, O = 16 u)
Q2 · Atoms and Molecules (Class 9) · HARD
What is the mass of 0.5 mole of nitrogen gas (N₂)? (Given: Atomic mass of N = 14 u)