staar chemistry review (readiness standards) density = 7.874 g/cm 3 iron corrodes in moist air iron...
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STAAR Chemistry Review
(Readiness Standards)
Density = 7.874 g/cm3 Iron corrodes in moist air
Iron melts at 1808 K Iron is soft when pure
Which of the following is a chemical property of iron?
4A
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 processa filtration process
4D
lanthanides transition elements
halogens Noble gases
The most reactive group of nonmetals are the
The most reactive group of nonmetals are the
5B
Ionic radius decreases Atomic number decreases
Ionic charge increases Atomic radius increases
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?
5C
Sodium Magnesium
Which element has an electron configuration of 1s22s22p63s1?
Lithium Argon
6E
0 β 1
Which particle will balance this nuclear equation?
40 40 Ca K + 20 19 _____
1 p 1
0 e-1 40
H 1
12B
What is the correct name for CuCO3?
Copper (II) Carbonate
Copper Carbide Copper Carbonate
Copper (I) Carbonate
7A
What is the correct formula for hypochlorous acid?
HClO
HClO3ClO
HCl
7B
Which is the correct Lewis structure for C2H4?
7C
If you exhale 88 grams of CO2 particles, how many atoms are present?
3.6X1024atoms 2 atoms
1.2X1024atoms 3 atoms
8B
Balance the following reaction. What is the coefficient for ZnCl2?
ZnCl2 + H3PO4 Zn3(PO4)2 + HCl
1 2
3 6
8D
How many moles of chloroform, CHCl3, are required to fill a 0.253L flask at 100.0C and 940 mmHg?
26mol 72mol
0.010mol 0.038mol
9A
Calculate the H value heat for the following reaction: Ca(OH)2(s) CaO(s) + H2O(g)
-106.5kJ/mol -1859.9kJ/mol
106.5kJ/mol 1859.9kJ/mol
Substance ΔHf (kJ/mol)CaO(s) -634.9Ca(OH)2(s) -983.2H2O(g) -241.82
11C
Which 10H
At 10°C which solute has the highest solubility?
NH4NO3 KClO4
NaNO3 KClO4
10B
Which of the following aqueous solutions will be a nonelectrolyte?
C12H22O11HCl
NaCl LiOH
10E
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
10F