An 8 L flask was filled to the brim with ammonia under normal conditions and then completely filled with water.

univerkov | December 7, 2020 | education

An 8 L flask was filled to the brim with ammonia under normal conditions and then completely filled with water. Determine the mass fraction (in%) of the solute in the resulting solution, assuming that in the process of filling the flask with water, the substance contained in it previously did not evaporate

First, you need to calculate the mass of ammonia:
m (NH3) = 8 / 22.4 * 17 = 6.07 g
Then we determine the mass of water, it is equal to 8000 g
Determine the mass fraction of the substance
It is equal to 6.07 / (8000 + 6.07)

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