Determine the mass fraction of impurities in iron-bearing ore if 100 kg of ore contains 78 kg of magnetic iron ore

m (impurities) = 100-78 = 22kg. w (impurities) = 22/100 = 0.22 (22%). Answer: the mass fraction of impurities is 22%.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.