In biologypercentage solutions are often preferred to molar ones. A 1% solution would have 1g of solute to 100ml of solvent. This would be labelled as a weight/ volume [w/v]percentage solution. For w/w then both solvent and solute would need to be weighed in the required ratios. Volume would accordingly be measured using a measuring cylinder[?], volumetric flask[?], pipette or similar.
Labels should show what the percentage relationships are.
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... housing units at an average density of 178.5/km² (461.9/mi²). The racial makeup of the village is 73.63% White, 12.30% African American, 0.13% Nativ ...