Dalam suatu larutan, terdapat 2 mol gula dan 8 mol air. Berapakah fraksi mol gula?, Apa rumus fraksi mol pelarut?, Dalam suatu larutan terdapat 3 mol urea dan 7 mol air. Berapakah fraksi mol air?, Apa rumus fraksi mol terlarut?, Rumus empiris suatu senyawa adalah CH₂. Jika Mr senyawa tersebut 28, tentukan rumus molekulnya (Ar C = 12, H = 2)!, Suatu senyawa mengandung 16 gram oksigen (O) dan 2 gram hidrogen (H). Ar O = 16 dan Ar H = 1. Tentukan rumus empirisnya.

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