Физика 9 класс! срочный вопрос

сколько граммов kno3 содержится в 250 мл 0.5 н раствора?

II. Fill in prepositions.<(Само задание)

Ada studies the Institute Foreign Languages. She is a student the English

Department. Her friend studies the French Department. Both the girls are their second

year.

They work hard the languages and are rather good them already. They study

hard class and home: the lessons they speak, read and write English and French. They

have studies the morning, so about three o'clock they come home the Institute.

Sunday morning they can sleep longer than working days and the evening they

can have a bit entertainment.