ASA EAS Which of the four R’s is considered the most effective? What program(s) could city officials introduce to help encourage people to adopt this particular R?
Four R: Reduce, reuse, recycle, recover

What happens to isotopes that are unstable?

What state of matter is ice a. liquid b. element c. solid d. gas

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)]