1.
LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M1V1 = M2V2)
A. 
B. 
C. 
D. 
2.
LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M1V1 = M2V2)
A. 
B. 
C. 
D. 
3.
LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M1V1 = M2V2)
A. 
B. 
C. 
D. 
4.
What is the atomic mass of the element cadmium (Cd)?
A. 
B. 
C. 
D. 
5.
How many electrons does an atom of the element mercury (Hg) have?
A. 
B. 
C. 
D. 
6.
What coefficient is needed in front of NH3 in order for the following equation to be balanced?
N2 + H2 → NH3
A. 
B. 
C. 
D. 
7.
Propane, C3H8 (g), burns in oxygen to form carbon dioxide and water. Which equation correctly shows this reaction?
a. C3H8 + O2 → CO2 + H2O
b. C3H8 + 5O2 → 3CO2 + 4H2O
c. C3H8 + 5O2 → CO2 + 4H2O
d. 2C3H8 + 5O2 → 3CO2 + 4H2O
A. 
B. 
C. 
D. 
8.
In which situation is a chemical reaction occurring?
A. 
B. 
C. 
D. 
9.
Given the unbalanced equation
___Fe2O3 + ___CO → ___Fe + ___CO2
When the equation is correctly balanced, using the smallest whole-number coefficients, what is the coefficient of CO2?
a. 1
b. 2
c. 3
d. 4
A. 
B. 
C. 
D. 
10.
Fossil fuels that contain carbon, such as coal, petroleum and natural gas, combine with oxygen to produce carbon dioxide gas and energy often in the form of heat. These processes are example of which type of reactions?
A. 
B. 
C. 
D. 
11.
What can a polar molecule dissolve?
A. 
B. 
C. 
D. 
12.
If a water solution conducts electricity, what must the solute be?
A. 
B. 
C. 
D. 
13.
All of the following speed up the dissolving process except _______.
A. 
B. 
Increasing the size of the solid to be dissolved
C. 
Increasing the temperature of the solvent
D. 
Crushing the solid to be dissolve
14.
Which is NOT an element?
A. 
B. 
C. 
D. 
15.
What is the mass of an atom with 8 protons, 7 neutrons, and 8 electrons?
A. 
B. 
C. 
D. 
16.
Which of the following has six valence electrons?
A. 
B. 
C. 
D. 
17.
In the electron cloud model of an atom, what accounts for most of the volume?
A. 
B. 
C. 
D. 
18.
When iron is exposed to air and moisture, it corrodes or rusts. Examine the equation below for the formation of hydrated iron (III) oxide:
__Fe + __O2 + __H2O → __Fe2O3+ 3H2O
How many molecules of water are contained in the product?
A. 
B. 
C. 
D. 
19.
In which situation is a chemical reaction occurring?
A. 
B. 
C. 
D. 
20.
H2SO4 + KOH → K2SO4 + H2O
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
NiCl2 + NaOH → Ni(OH)2 + 2NaCl\
H2 + O2 → 2H2O
All of the equations above show what?
A. 
Reactants combining with products to produce a new substance
B. 
No chemical changes occurring
C. 
Physical changes taking place
D. 
Reactants combining to produce new substances
21.
Propane, C3H8(g), burns in oxygen to form carbon dioxide and water. Which equation correctly shows this reaction?
a. C3H8 + O2 → CO2 + H2O
b. C3H8 + 5O2 → 3CO2 + 4H2O
c. C3H8 + 5O2 → CO2 + 4H2O
d. 2C3H8 + 5O2 → 3CO2 + 4H2O
A. 
B. 
C. 
D. 
22.
What coefficient is needed in front of NH3 in order for the following equation to be balanced?
N2 + H2 → NH3
A. 
B. 
C. 
D. 
23.
What is the name of the OH- ion?
24.
Fossil fuels that contain carbon, such as coal, petroleum and natural gas, combine with oxygen to produce carbon dioxide gas and energy often in the form of heat. These processes are example of which type of reactions?
A. 
B. 
C. 
D. 
25.
The _______ is the complete arrangement of electrons in an atom and determines how the atom will chemically bond and influences the orientation of its orbital in space, and its spin.
A. 
B. 
C. 
Chemical properties of an atom