When camping with your family, you boil a pot of water over a campfire. Describe the physical and chemical changes that take place during this process. [2]

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Can someone me with questions 15 to 17 plz.

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!