Calculate the molar ratio of phenanthroline to iron for the 20 mg L-1 iron solution. How does it compare to the 3:1 ratio in the equilibrium expression for the iron-phenanthroline reaction

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

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!

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi