21.0g of pure silver have a volume of 2.00cm^3 what is the density of the silver

What must happen before a body cell can begin mitotic cell division

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!

How can the periodic table be used to predict the behavior of elements?