Find the mass fraction of glucose in a solution containing 280 g of water and 40 g of glucose.

It’s simple. To find the mass fraction, the mass of the substance must be divided by the mass of the solution.
W = (m in-va / m solution) * 100%
Mass of matter = 40
Solution mass = 280 + 40 (water + salt)
W = 40/320 * 100% = 12.5%



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