Some Basic Concepts of Chemistry (1st PUC)
Mole concept, stoichiometry, empirical and molecular formula.
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Take a full mock →Q1 · Some Basic Concepts of Chemistry (1st PUC) · EASY
What is the mass of CO₂ produced when 6.0 g of carbon is completely burnt in excess oxygen? (Atomic mass: C=12, O=16)
Q2 · Some Basic Concepts of Chemistry (1st PUC) · MEDIUM
If 5×10²⁰ molecules are removed from 49 mg of H₂SO₄, how many moles of H₂SO₄ are left? (Take Avogadro's number Nₐ = 6×10²³ mol⁻¹, Molar mass of H₂SO₄ = 98 g/mol)