A 538mg sample of an unknown ORGANIC liquid with emperical formula(C5H7N)4 is dissolved 10.0g of water .the boiling point of this solution is 100.17c°.calculate the MOLECULAr FORMULA and exact MOLECULAR weight of the unknown.

The electron configurations of two different atoms are shown below. each yellow electron has a charge of 1−, and the net charge of each nucleus is shown. these atoms will combine with bond. a. an ionic b. a positive c. a negative d. a covalent plzzz mee with !

The grooves or folds of the brain are called

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?