1) What is the formula to find the percentage composition of an element in a compound? a) (Atomic mass / Total molar mass) × 100 b) (Molar mass / Atomic mass) × 100 c) (Molar mass × Atomic mass) ÷ 100 d) (Element mass × Compound mass) × 100 2) The molar mass of NaCl is 58.5 g/mol. What is the percentage of chlorine in NaCl? a) 39.32% b) 60.68% c) 50% d) 25% 3) Which compound is commonly known as table salt? a) H₂O b) NaCl  c) CO₂ d) H₂SO₄ 4) Why is knowing the percentage composition important in daily life? a) To know how much each element contributes to a product b) To memorize all elements c) To make the product colorful d) To avoid chemical names 5) If oxygen’s percentage in water (H₂O) changes, what could happen? a) It may no longer behave as water b) It will become salt c) It will turn into a solid d) It will lose its color

Who's Got the Right Formula?

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