In the formula for water what does the subscript 2 indicate

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

The reaction q+r2=r2q is found to be first order in r2 and