Properties of Water

Water would be classified as this type of matter.

• element

• compound

• mixture

• atom

Which of the following best describes a water molecule?

• one hydrogen atom bonded to two oxygen atoms, with a slightly positive overall charge

• two hydrogen atoms bonded to one oxygen atom, with a slight negative charge on one side and a slight positive charge on the other

• two hydrogen atoms and one oxygen atom together in the same place but not bonded together

• one atom of H₂O bonded to other H₂O atoms because of a slightly negative charge on one side and a slightly positive charge on the other

Because the oxygen atom in a water molecule pulls stronger on the shared electrons...

• water is a polar molecule

• the hydrogen atoms cannot stay bonded

• water molecules are electrically neutral

• no electrons are safe

The tendency of water molecules to attract (stick to) other water molecules is called...

• cohesion

• adhesion

• polarity

• specific heat

The tendency of water molecules to attract (stick to) other substances is called

• cohesion

• adhesion

• polarity

• specific heat

Why does ice float in liquid water?

• ice is less dense than liquid water

• ice is more dense than liquid water

• ice has the same density as water because they are both H₂O

• ice is lighter than liquid water

Why is most of the water we encounter rarely pure H₂O?

• There is no such thing as pure H₂O

• Water easily dissolves other substances

• Water rarely stays in liquid form long enough

• There isn't enough H₂O

Because of water's high specific heat capacity...

• water warms up and cools down very slowly

• water sticks to other water molecules easily

• water dissolves other substances very easily

• water is rarely found as pure H₂O

The density of water is about...

• 1 g/mL

• 100 g/mL

• the same as the density of ice

• equal to any object placed in it

How would you calculate the density of a substance?

• d = m/v

• d = v/m

• d = mv

• d = 1/m