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