1) which pair of species is most likely to form an ionic bond?
a.two electrically neutral species
b.two electrically charged species, one positive and one negative
c.two negatively charged species
d.two positively charged species
2) the neutron got its name because which of the following is true?
a.it neutralizes protons
b.it neutralizes electrons
c.it does not have an electrical charge
d.it has no effect on any atomic properties
3) what type of particles can atoms gain or lose when they become ions?
a.protons
b.neutrons
c.electrons
d.it depends on the atom involved.
4) which of the following is true in the carbonate ion, co3
2-?
a.the carbon atom does not have an octet.
b.the ion has 22 valence electrons.
c.the electrons are constantly moving from one bond location to another.
d.none of the above is true.
5) the blood-brain barrier is impermeable to which of the following species?
a.oxygen
b.carbon dioxide
c.glucose
d.none of these
6) approximately what volume of blood passes through a human kidney each day?
a.1.5 lc.15 l
b.10 ld.100 l
7) which of the following excretion products is a lactam?
a.creatinec.hippuric acid
b.creatinined.none of these
8) atoms of which of the following elements are largest?
a.rb
b.k
c.na
d.none, they are all the same size.
9) sodium chlorate, an ingredient in many common herbicides, has sodium, chlorine
and oxygen atoms in the ratio 1:1:3. what is the correct formula for sodium chlorate?
a.naco3
b.soclo3
c.naclo3
d.none of these
10) approximately what percentage of blood plasma is water?
a.15%c.60%
b.30%d.90%
11) which of the following approximates the hnh bond angle in ammonia, nh3?
a.109.5o
b.107.3o
c.120.0o
d.90.0o
12) in a lewis structure, which of the following atoms can have more than eight
electrons associated with it?
a.c
b.n
c.o
d.none of these
13) laughing gas, sometimes called nitrous oxide, has the formula n2o. what is the
proper chemical name for nitrous oxide?
a.nitrogen oxide
b.nitrogen dioxide
c.dinitrogen oxide
d.dinitrogen oxygen
14) if we consider the elements c, n, and o, which types of orbitals do these elements
use in bonding?
a.only s
b.only p
c.both s and p
d.s, p and d
15) plasma accounts for approximately what percentage of whole blood?
a.25-35%c.70-80%
b.50-60%d.85-90%
16) suppose a new element named questinium has two isotopes. these isotopes are
qu-297 (40.30%, 296.78 amu) and qu-301 (59.70%, 300.88 amu). what is the atomic
weight of questinium, reported to the correct number of significant digits?
a.299 amu
b.299.0 amu
c.299.2 amu
d.299.23 amu
17) which of the following lipids lower blood pressure?
a.arachidonic acidc.prostaglandins
b.leukotrienesd.thromboxanes