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Exam 2: Chemical Basis of Life

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Question 21

Multiple Choice

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What is the atomic weight for an atom with 12 protons and 11 neutrons?

A) 11
B) 12
C) 23
D) 24

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

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Question 22

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Addition of lactic acid to a solution will result in a(n) __________ in the pH of the solution.

A) increase
B) decrease

C) A) and B)
D) undefined

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Question 23

Multiple Choice

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When atoms form bonds by sharing electrons, the bond formed is a(an) __________bond.

A chemical reaction in which parts of two different molecules trade positions is called a(an) _________ reaction.

What is the normal range for blood pH?

FX→ F + XThis reaction is an example of a(n) __________ reaction.

Lipids __________ dissolve in water. Thus, they are described as being __________.

Atom X gains one electron, and Atom Y loses one. As a result, Atom X becomes __________ charged, Atom Y becomes __________ charged, and a(n) __________ bond can form.

In order to show how atoms within a molecule are joined and arranged, a representation called a __________ formula is used.

A chemical reaction in which bonds are broken is associated with the __________ of energy.

A molecular formula represents the numbers and types of atoms in a molecule.

How would a decomposition reaction be illustrated?

Within an atom, the number of protons plus the number of ________ is approximately equal to the atomic weight of the atom.

A covalent bond is formed when two atoms share electrons.

The chemical behavior of atoms results from interactions between the __________ of each atom.

Organic substances always contain atoms of hydrogen and _______________.

The pH of a solution is the measure of its _________ ion concentration.

Compare the compounds C ₆H ₁₂O ₆ and C ₅₇H ₁₁₀O ₆. Which is the carbohydrate?

Chemistry is the branch of science that deals with the composition of matter.

Indicate the compound that is an organic substance.