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How to draw a mixture

Select the structures and choose Object › Chemistry › Make mixture. They go in one bracket with a 1 : 1 ratio; change the proportions in Properties, where each component shows its mol % and wt %.

Steps

  1. Draw or insert the components, for example ethanol and water, and select them all.

  2. Choose Main menu › Object › Chemistry › Make mixture. They are bracketed together with their ratio under the bracket, 1 : 1 to start.

    Ethanol and water in one bracket, with 1 : 1 under it.Ethanol and water in one bracket, with 1 : 1 under it.

  3. In Properties, under Proportions, type a number for each component. They are molar, left to right, and any positive numbers work, such as 3 and 1 or 0.7 and 0.3.

    Proportions in Properties: ethanol and water at 1 each, 50.0 mol % and 71.9 wt % ethanol.Proportions in Properties: ethanol and water at 1 each, 50.0 mol % and 71.9 wt % ethanol.

Each component shows its mol % and wt %, and the mixture its mean molar mass.

Atoms, bonds and ringsHow to use abbreviations like OMe, Boc and PhPoint at an atom, press Enter and type a label such as OMe or Ph. Object › Expand labels draws a label out as its atoms; Object › Contract to label turns selected atoms back into a label; Define abbreviation… names a group as your own label.Reactions and arrowsHow to draw a reaction schemeDraw or insert the reactants, press W and drag a reaction arrow after them, write the conditions above it with the Text tool, then add the products after the arrow. Or press / and type the whole reaction as reaction SMILES.

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Last updated Nov 12, 2026