Christine Davis - IU8
Quiz von , erstellt am more than 1 year ago

Biology (Essential Chemistry of Life) Quiz am Water as an Essential Molecule of Life, erstellt von Christine Davis - IU8 am 31/07/2017.

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Christine Davis - IU8
Erstellt von Christine Davis - IU8 vor etwa 7 Jahre
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Water as an Essential Molecule of Life

Water as an Essential Molecule of Life

Frage 1 von 6

2

Which of the following makes up a molecule of water?

Wähle eine der folgenden:

  • One atom of hydrogen and one atom of oxygen

  • One atom of hydrogen and one atom of sodium

  • Two atoms of hydrogen and two atoms of oxygen

  • Two atoms of hydrogen and one atom of oxygen

Erklärung

Frage 2 von 6

2

Most of water's properties occur because it is:

Wähle eine der folgenden:

  • A polar covalent bonded molecule

  • Made with oxygen

  • A polar ionic

  • Makes up 75% of the earth

Erklärung

Frage 3 von 6

2

Hydrogen bonds take place between the …

Wähle eine der folgenden:

  • hydrogens of the water molecules

  • oxygen and oxygen of the water molecules

  • oxygen on one water molecule and the hydrogen of the other water molecule

  • oxygen and hydrogen of the same molecule

Erklärung

Frage 4 von 6

2

Which property of water is responsible for the variety of aquatic organisms throughout the various seasons?

Wähle eine der folgenden:

  • adhesion

  • cohesion

  • High specific heat

  • Solid water is less dense than liquid water

Erklärung

Frage 5 von 6

1

Nuclear reactors can run into problems if the reactor and fuel rods get too hot. They will use water as a coolant to keep the reactor core at a proper temperature. What property of water is this demonstrating?

Wähle eine der folgenden:

  • Cohesion

  • high specific heat

  • universal solvent

  • adhesion

Erklärung

Frage 6 von 6

1

A polar bond is created by unequally shared electrons. Nonpolar bonds are equally shared electrons. Which statement best explains why water will dissolve polar compounds and NOT non polar compounds?

Wähle eine der folgenden:

  • Polar compounds are charged molecules with + and – ends. These charged areas will attract other charged areas of other molecules.

  • Polar and nonpolar are opposite molecules. Opposite molecules will dissolve opposites.

  • Polar molecules are like ice, they are very cold; nonpolar are warm

  • Ionic are the best to be dissolved because they have opposite charges.

Erklärung

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