Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of 15.0 h . A sample of sodium-24 with an inital mass of 12.0 g was stored for 60.0 h . How many grams of sodium-24 are left in the sample after 60.0 h ?

The grooves or folds of the brain are called

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Which statement best describes isomers? a. isomers are alcohols that have the same functional group. b. isomers have at least one carbon-carbon double bond. c. isomers have the same molecular formula but different structural properties.