Nomalum tuzning xona haroratida eruvchanligi 30 g ga teng. 65 g toying

82. (v20/21-111-6) Nomalum tuzning xona haroratida eruvchanligi 30 g ga teng. 65 g toyingan eritmasi 0В°C gacha sovutilganda 5 g tuz chokmaga tushsa, uning shu gradusdagi eruvchanligini toping. A)20 B)15 C)25 D)30