The half life of I 137 is 8.07 days. how much of 25g sample is left after 40.35 days

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Drug abuse will not lead to physical and psychological dependence. true or false ?

Explain what happens at the saturation point when adding salt to water at room temperature.