How many grams of water are produced if 3.45x10^8 grams of oxygen are burned in excess hydrogen.

How is the composition of a meteorite relevant to finding out the composition of earth's core?

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

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?