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Chemistry Review

Total questions: 20

Worksheet time: 29mins

Name
Class
Date
1.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
2.
The number 6.02 x 1023 is called...
a)

Atom's number

b)

Bohr's number

c)

Mole's number

d)

Avogadro's number

3.
Which would have more atoms?
a)

1 mole of Li

b)

1 mole of Au

c)

1 mole of Si

d)

None, all are equal

4.
What is the molar mass of AuCl3?
a)

96 g

b)

130 g

c)

232.5 g

d)

303.3 g

5.

What will the percent yield of a reaction be if the theoretical yield is 40.5 g Cu and experimentally a yield of 38.7 g Cu was measured?

a)

82%

b)

105%

c)

87%

d)

95.6%

6.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)

6

b)

2

c)

3

d)

1

7.

When two substances react to form products, what is the reactant that is used up first called?

a)

explosive reactant

b)

true reactant

c)

limiting reactant

d)

excess reactant

8.

What is conserved in every chemical reaction?

a)

mass and molecules

b)

mass and liters

c)

mass and atoms

d)

mass and moles

9.
Balance this equation:
P4+O2  -->  P2O3
a)

3 P4+ O2 --> 2 P2O3

b)

 P4+ O2 --> 2 P2O3

c)

 P4+ 3 O2 --> 2 P2O3

d)

 P4+ 2 O2 --> 3 P2O3

10.

When looking at a chemical equation, what tells you the mole ratios?

a)

the subscripts (small numbers at the bottom)

b)

the element symbols

c)

the coefficients

d)

15.0

11.

Solid or liquid that is being dissolved? (a)  

Choose from the below words
solute
solvent
solution
solubility
12.
What does it mean to be "Soluble" ?
a)
Capable of being a solid.
b)
To have soul.
c)
Capable of being dissolved.
d)
To sink.
13.
What is the unit for molarity?
a)
mass/liters
b)
moles
c)
liters
d)
moles/liter
14.
A measure of the amount of solute in a given amount of solvent or solution is...
a)
saturated
b)
solubility
c)
concentration
d)
miscible
15.
A saturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
16.
What is the molarity of a 2 liter solution containing 5 moles of NaCl?
a)

5.0

b)

0.4

c)

2.5 moles/liter

d)

10 moles/liter

17.
Type of intermolecular force present in HF.
a)
dipole dipole
b)
dispersion
c)
H-bond
d)
ionic
18.
Which of the following has the highest boiling point?
a)
H2
b)
NH3
c)
N2
d)
O2
19.

What shape would PH3 have?

a)

Trigonal Planar

b)

Trigonal pyramidal

c)

Bent

d)

Linear

20.
What is the bond angle for this molecule?
a)
109.5
b)
120
c)
107
d)
90

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