How many molecules are in 2.50 moles of H2O? 0 1.51 X 1024 molecules of H20
0 4.15 X 10-24 molecules of H20
0 3.01 X 1024 molecules of H20
O 8.31 X 10-24 molecules of H20

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.