Acompound differs from a mixture in that a compound
-contains only one element
- varies in chemical composition depending on the sample size
- has a definite composition by the elements that the compound contains
- can be classified as either heterogeneous or homogeneous

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)]