2.8 grams of phenol are dissolved in 180 ml of water. find the mass fraction of a thing in a solution.

The mass fraction of the solute is the ratio of the mass of the solute m (in-va) to the total mass of the solution m (solution). The mass fraction is denoted by the symbol ω (omega) and is expressed in fractions of a unit or in percent.
ω (%) = m (in-va) • 100% / m (solution)
ω (%) = 2.8 • 100/180 = 1.6%



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