Which is an example of chemical change
a. mixing of posted colors
b. formation of clouds
c. sugar dissolving in water
d. separating salt from seawater

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation

How many moles of kci are produced from 2.50 moles k