Spectroscopy There is something strange about Star 3’s spectrum.

Explain what this is called and what it means about this star.

Convert .347 kilometers to miles show your work

What is the density, d, of a substance with a volume of v = 12.5 cm3 and a mass of m = 74.4 g ?

Achemist needs to prepare a buffer solution of ph 8.80. what molarity of nh3 (pkb = 4.75) is required to produce the buffer solution if the (nh4)2so4 in the solution is 1.8 m?