Elements like argon and krypton are inert because all of their electron shells are: a. Full
C. Half-full
d. Filled with an equal number of electrons
b. Empty

Embryos of different species look very similar, which shows that the organisms share a ancestor.

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?