oxtonl274 oxtonl274 28-12-2023 Chemistry contestada Which of the following sets of empirical formula, molar mass, and molecular formula is correct? 1) CH, 78 g, C₁₃H₁₃ 2) CH‚ÇÑN, 90 g, C₃H₁₂N₃ 3) CaO, 56 g, Ca₂O₂ 4) C₃H‚ÇàO, 120 g, C₃H‚ÇàO₂