Which statement describes only the quantum mechanical model of the atom? a) energy is quantized. eliminate b) has discrete energy levels. c) has sub levels within the energy levels. d) sometimes referred to as the "planetary" model.

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury