8. The compound 1,2-diaminoethane, HNCHCH, NH,, is a bidentate ligand; in formulae, it is usually abbreviated to ‘en'.
When 1,2-diaminoethane is added to [Co(NH)]* in aqueous solution,
[Co(en)3]2+ is formed. What is the best explanation for this?

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

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)]