Think of a famous person from your country. Collect information about him/her under the headings. Write his/her biography for the school magazine (100-120 words). Follow the plan.

W(вещества) = m(вещества)/m(раствора) х 100%
m(раствора) = m(H2O) + m (соли) = 400г + 50г = 450г
w(соли) = m(соли)/m(раствора) х 100% = 50г/450г х 100% = 11,1%