STAAR Chemistry Review

1
STAAR Chemistry Review (Readiness Standards)
2
4A
Which of the following is a chemical property of
iron?
Density 7.874 g/cm3
Iron corrodes in moist air
Iron melts at 1808 K
Iron is soft when pure
3
4D
One way that mixtures differ from pure substances
is in the methods that can be used to separate
them into their components. Which of the
following is a method used to separate the
components of some mixtures?
a nuclear reaction
a chemical reaction
an electrolysis process
a filtration process
4
5B
The most reactive group of nonmetals are the
The most reactive group of nonmetals are the
lanthanides
transition elements
halogens
Noble gases
5
5C
Which of the following correctly describes a
trend from the top to the bottom of the Alkaline
Earth Metals group of elements on the periodic
table?
Ionic radius decreases
Atomic number decreases
Ionic charge increases
Atomic radius increases
6
6E
Which element has an electron configuration of
1s22s22p63s1?
Magnesium
Sodium
Lithium
Argon
7
12B
Which particle will balance this nuclear
equation? 40 40 Ca ? K
20 19 _____
0 ß 1
0 e -1
1 p 1
40 H 1
8
7A
What is the correct name for CuCO3?
Copper (I) Carbonate
Copper (II) Carbonate
Copper Carbide
Copper Carbonate
9
7B
What is the correct formula for hypochlorous
acid?
HCl
HClO
ClO
HClO3
10
7C
Which is the correct Lewis structure for C2H4?
11
8B
If you exhale 88 grams of CO2 particles, how many
atoms are present?
3.6X1024atoms
2 atoms
1.2X1024atoms
3 atoms
12
8D
Balance the following reaction. What is the
coefficient for ZnCl2? ZnCl2 H3PO4 ?
Zn3(PO4)2 HCl
1
2
3
6
13
9A
How many moles of chloroform, CHCl3, are required
to fill a 0.253L flask at 100.0?C and 940 mmHg?

26mol
72mol
0.010mol
0.038mol
14
11C
Substance ?Hf (kJ/mol) CaO(s) -634.9 Ca(OH)2(s) -
983.2 H2O(g) -241.82
Calculate the ?H value heat for the following
reaction Ca(OH)2(s) ? CaO(s) H2O(g)
-1859.9kJ/mol
-106.5kJ/mol
106.5kJ/mol
1859.9kJ/mol
15
Which
10H
16
10B
At 10C which solute has the highest solubility?
NH4NO3
KClO4
NaNO3
KClO4
17
10E
Which of the following aqueous solutions will be
a nonelectrolyte?
HCl
C12H22O11
NaCl
LiOH
18
10F
All of these can affect the rate at which a solid
dissolves in water except
decreasing air pressure
stirring the water
increasing the temperature of the water
using larger crystals of the solid