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.

Find the empirical formula of each of the following compounds. given mass or for each element in a sample of the compound 3,611 g ca; 6.389 g c1

Is powdered sports drink ionic or covalent ? 10pts !

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]