Question

A) how many grams of Zinc (II) Nitrate would be required to produce 350 ml of a .50 M solution?

Water is Unusual because...(Choose All true)

- soilid phase is less compact than the liquid phase.

-Most molecules as small as water are gases at room temperature

-most molecules as small as water have higher boiling points than water does

-its very strong hydrogen bonding and polarity (among other things) give it unusual properties

Answer 1

Hello

gZn = 350E-3 L x (0.50mol/L) x (65.39 g / 1 mol) = 11.44 g Zn

Regarding the second question, im not clear what is it that you are asking. Yes, all the statement are true. But the last one resume all the others

Oxygen is very electronegative and has a high charge density owing to its small size. As such, when it bonds with an atom like hydrogen, it can considerably attract some of the hydrogen's electrons towards itself. In water, oxygen bonds with two hydrogen atoms, leaving two lone pair of electrons.

This attraction is great enough to make the water molecules 'stick' to each other. This means, in order to break the intricate hydrogen bonding between the molecules of water, you need to supply more energy than an equivalent compound but without hydrogen bonds. This means a higher boiling point than Nitrogen or Methane. Since N2(g)N2(g) and CH4(g)CH4(g) cannot form hydrogen bonds with each other, hence the only force present in them is London Dispersion Forces. This is significantly weaker than Hydrogen Bonded molecules of water so relatively little energy is needed to break their intermolecular bonds. As such, they remain as gases in RTP, due to the low boiling points these substances have due to the small intermolecular attraction.

The hydrogen atoms of one water molecule are attracted to the lone pairs of electrons on the oxygen atoms of adjoining water molecules. This attractive force between molecules is very, very weak on one hand; compared to the attractive forces of a chemical bond, the hydrogen bond attractive forces are really small. Over large distances, however, these small attractive forces add into something very, very powerful. An overall sticky effect is created. "Sticky" in that the water molecules are more attracted to each other than molecules of that molecular mass would normally be. Molecules like oxygen gas and nitrogen gas are gases at room temperature. Because of the hydrogen bonding between water molecules, water is a liquid at room temperature.

So Water unique properties is because of its hydrogen bonds.