Предмет: Химия, автор: ZZZZZZ5

Объясните пожалуйста как решить задачу. относительная плотность углеводорода по гелию равна 14.5. определить молекулярную формулу алкана

Ответы

Автор ответа: naugros

находим массу алкана. равна плотности по гелию умножить на массу гелия= 14,5*4=58
Затем по общей формуле алканов CnH2n+2 переводим в цифры 12n+2n+2.или 14n+2=58 отсюда 14n=58-2
n=56/14=4 формула:С4Н10- бутан

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