The Solution and buffer calculator plugin

Steps

1. Select the structure, for example aspirin.
2. Choose Plugins › Solution and buffer calculator: Open Solution and buffer calculator. The window reads the formula and molar mass of the selection, for aspirin C₉H₈O₄ · 180.159 g/mol. Select another structure and press Use selection to read it again.
3. Pick Solution, Dilution or Buffer.
4. On Solution, set Find (for example Mass to weigh), then the Concentration and Volume with their units. The answer reads in full, such as "Dissolve 1.802 g of C₉H₈O₄ (180.2 g/mol) to 100 mL for 0.1 M (10 mmol)."
5. Press Put on the page to place the recipe as text, or Copy.