Christine Davis - IU8
Quiz por , criado more than 1 year ago

Biology (Essential Chemistry of Life) Quiz sobre Water as an Essential Molecule of Life, criado por Christine Davis - IU8 em 31-07-2017.

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Christine Davis - IU8
Criado por Christine Davis - IU8 mais de 7 anos atrás
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Water as an Essential Molecule of Life

Questão 1 de 6

2

Which of the following makes up a molecule of water?

Selecione uma das seguintes:

  • 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

Explicação

Questão 2 de 6

2

Most of water's properties occur because it is:

Selecione uma das seguintes:

  • A polar covalent bonded molecule

  • Made with oxygen

  • A polar ionic

  • Makes up 75% of the earth

Explicação

Questão 3 de 6

2

Hydrogen bonds take place between the …

Selecione uma das seguintes:

  • 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

Explicação

Questão 4 de 6

2

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

Selecione uma das seguintes:

  • adhesion

  • cohesion

  • High specific heat

  • Solid water is less dense than liquid water

Explicação

Questão 5 de 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?

Selecione uma das seguintes:

  • Cohesion

  • high specific heat

  • universal solvent

  • adhesion

Explicação

Questão 6 de 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?

Selecione uma das seguintes:

  • 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.

Explicação

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