Розчинність деякої солі при 20 градусів по цельсію дорівнює 40.обчисліть масову частку цієї солі у 300г начисеного розчину

hello my friend

i saw an amazing play yesterday!

this play describes life in the 20th century. actors had   really hard roles but the played them very good. its sad that you could not saw this play i hope someday day we will meet each other and go to this incredible play!

have a good day

your friend