A sample of H2(g) and a sample of N2 (9) at STP contain the
same number of molecules. Each sample must have:

sample of N2(g) at STP contain the same number of molecules. Each sample must have:

The same volume, but a different mass

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.