30 g natriy karbonat kristallogidratidan (Na2C03-10H2O) foydalanib tay

30. (03-1-53) 30 g natriy karbonat kristallogidratidan (Na2C03-10H2O) foydalanib tayyorlangan 200 g eritmadagi natriy karbonatning massa ulushini 3% gacha kamaytirish uchun qancha massa (g) suv qoshish kerak? A)130 B)155 C)140 D)171
E) 100