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(chem001)[2010](f)quiz~3224^_10040.pdf
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Section I. Multiple Choices (8X3 pts)
1.
D
2.
A
3.
B
4.
A
5.
C
6.
D
7.
C
8.
C
Section II
1. (6X1 pts)
a.
chemical changes
b.
physical changes
c.
chemical changes
d.
physical changes
e.
physical changes
f.
chemical changes
2. (8X2 pts)
a.
homogenous mixture
b.
element
c.
heterogeneous mixture
d.
compound
e.
compound
f.
element
g.
heterogeneous mixture
h.
heterogeneous mixture
3. a) Elements might combine in more than one set of proportions;
For example, nitric oxide and nitrogen dioxide are both made up of nitrogen atoms
and oxygen atoms, but they are different compounds (4 pts).
b) The mass ratio is 56u:16u=7:2=3.5:1 (3 pts).
c) From the formula we can get that 56x/16y=2.265/1
so x/y=3/4. The formula is Fe3O4 (5 pts).
4.
(4X3 pts) a) Potassium 1s22s22p63s23p64s1 b) Germanium 1s22s22p63s23p63d104s24p2 c) Vanadium 1s22s22p63s23p63d34s2 d) Cl-ion 1s22s22p63s23p6
5.
(4X3 pts) a) Indium [Kr]4d105s25p1 b) Arsenic [Ar]3d104s24p3 c) Tungsten [Xe]4f145d46s2 d) Copper [Ar]3d104s1
6.
(3X3 pts)
a) F 1 b) S 2 c) Sr 0
7.
(3X3 pts)
a) HCl b) SO32-
c)SO2