What is the purpose of the cobalt blue glass?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?