Did the average mass of 1 penny increase or decrease as the percentage of post- 1982 pennies increased in the sample

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

Why does ammonia, nh3, behave as a base when it reacts with an acid? z

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)