Amole of the element u (uranium) and a mole of co2

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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!

What relationship exists between an enzyme and a catalyst?