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6 empirical/molecular formula problems. P1: '75% C, 25% H. Empirical formula: ___' (CH₄ - methane!). P2: '50% S, 50% O. Empirical: ___' (SO). P3: '43.7% P, 56.3% O. Empirical: ___' (P₂O₅). P4: 'Empirical CH₂O, molar mass 60. Molecular formula: ___' (C₂H₄O₂ - acetic acid). P5: 'Empirical CH, molar ma

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