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Exam 2: The Nature of Molecules and the Properties of Water

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Question 31

Multiple Choice

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In a chemical analysis of an animal tissue sample,which element would be in the least quantity?

A) carbon
B) hydrogen
C) nitrogen
D) oxygen
E) iodine

F) A) and B)
G) B) and E)

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Question 32

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Cl + e^- → Cl^- is an example of a:

A) oxidation.
B) reduction.
C) polymerization.
D) ionization.

E) A) and D)
F) B) and C)

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Question 33

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You walk down into your basement to find that the carpeting on the floor is damp.Concerned,you look around for large puddles of water or broken pipes,but find none.In fact,only the basement floor and carpeting is damp.You realize that water must have wicked into the carpet from the floor by ________.

The two nitrogen atoms in nitrogen gas (N₂) share six electrons forming a ________.

Which atomic particle has no charge and is located in the nucleus?

When atoms gain or lose electrons,they become negatively or positively charged.These negatively or positively charged atoms are known as

Dennis had a history of heart disease in his family and was reducing his intake of saturated fats.Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept.If a carbon were bonded to two carbons,how many hydrogens could it accept?

Oxygen has an atomic mass of 16 and an atomic number of 8.How many neutrons are present?

All atoms tend to fill their outer energy levels with the maximum number of electrons,usually eight.Depending on whether atoms satisfy the octet rule will predict:

You recently discovered a new element,and find that this particular element has one electron in its outer energy level.What would you expect will happen to an atom of this element if placed in water?

The amino acid glycine (C₃NO₂H₆) is a(an) :

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ________ of energy to break hydrogen bonds.The energy is ________ from heat produced by your body,thus helping to lower the surface temperature of your body.

How many hydrogen bonds can a water molecule form?

Which element's isotope is commonly used to determine when biological samples such as fossils,were formed?

The sub-atomic particle with a positive charge is ________.

The reaction (H₂ + F₂ → 2HF) is an example of a redox reaction.In reality,two half reactions are occurring.The half reaction (H₂ → 2H⁺ + 2e^-) is a(n) :

Bicarbonate ions in the blood can absorb hydrogen ions,keeping pH balanced.Bicarbonate is acting as a ________ in blood.

If water were nonpolar it would not form hydrogen bonds.At normal room temperatures this nonpolar water would be ________.

In the crystal matrix of ordinary salt,the sodium and chlorine are held together by:

How is the bond in F₂ different from the bond in KCl?