Why do atoms tend to form ions with eight valence electrons?

If you want to change the pitch of a sound, you have to change the question 7 options: volume speed amplitude frequency

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mm glucose and 1 mm sodium chloride. if the vesicle is placed in pure water, which of the following happens faster? a. na+ diffuses out. b. cl– diffuses out. c. h2o diffuses in. d. glucose diffuses out. e. sodium chloride diffuses out.