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ChemBCP-Tri3-Unit 1 Test Review

Total questions: 53

Worksheet time: 2hrs 10mins

Name
Class
Date
1.
The molar mass of an element is equal to its...
a)
Atomic mass
b)
Atomic number
c)
Oxidation number
d)
Valence electrons
2.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
3.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
4.
What is the molar mass of CO2?
a)
12
b)
16
c)
32
d)
44
5.

Calculate the molar mass of NH4NO2

a)

50 g/mol

b)

60 g/mol

c)

64 g/mol

d)

78 g/mol

6.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
7.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
8.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
6
c)
8
d)
24
9.

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

10.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

11.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following BALANCED chemical equation to determine the ratio:
2HgO → 2Hg + O22HgO\ \rightarrow\ 2Hg\ +\ O_2   
What is the ratio of HgO to Hg

a)

2:2

b)

1:1

c)

2:1

d)

1:2

12.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following BALANCED chemical equation to determine the ratio:
4NH3+6NO → 5N2+6H2O4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O   
What is the ratio of  NH3NH_3   to  NONO  

a)

4:5

b)

1:1

c)

2:3

d)

4:6

13.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following BALANCED chemical equation to determine the ratio:
4NH3+6NO → 5N2+6H2O4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O   
What is the ratio of  H2OH_2O   to  N2N_2  

a)

4:5

b)

1:1

c)

6:5

d)

5:6

14.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following UNBALANCED chemical equation to determine the ratio:
CO2 + LiOH → Li2CO3 + H2OCO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O   
What is the ratio of  H2OH_2O   to  LiOHLiOH  

a)

1:1

b)

1:2

c)

2:2

d)

2:1

15.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6? 
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L 
c)
1 mol = 6.02x 1023 particles 
d)
more than one
16.
The number 6.02 x 1023, which is the number of particles found in a mole. 
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
17.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
18.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
19.
How many moles are 2.85 x 1018 atoms of iron?
a)
4.73 x 10-6 moles
b)
1.72 x 1042 moles
c)
1.72 x 10-42 moles
d)
4.73 x 106 moles
20.

Using the balanced chemical equation:

2C4H10 + 13O2 --> 10H2O + 8CO2


Calculate the number of grams of C4H10 needed to produce 5.12 moles of CO2.

a)

58.0 g C4H10

b)

2.56 g C4H10

c)

74.2 g C4H10

21.

Using the balanced chemical equation:

2 Cu + O2 --> 2 CuO


Determine the number of grams of O2 needed to produce 0.7684 moles of CuO.

a)

32.00 g O2

b)

0.3842 g O2

c)

12.29 g O2

22.

Using the balanced chemical equation:

Al2(SO4)3 + 3 BaCl2 --> 2 AlCl3 + 3 BaSO4


What is the mole ratio between aluminum sulfate and aluminum chloride?

a)

1 mol Al2(SO4)3 / 2 mol AlCl3

b)

3 mol Al2(SO4)3 / 2 mol AlCl3

c)

2 mol Al2(SO4)3 / 1 mol AlCl3

23.
What is the mass of one mole of AuCl3?
a)
96g
b)
130g
c)
232.5g
d)
303.5g
24.
4.0 moles of H2O would have what mass?
a)
72 g
b)
23 g
c)
68 g
d)
4.5 g
25.
How many moles are in 22 g of argon? 
a)
880 moles
b)
0.55 moles
c)
1.81 moles
d)
5 moles
26.
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
27.

2NaClO3 (s) → 2NaCl (s) + 3O2 (g)

12.00 moles of NaClO3 will produce how many grams of O2?

NaClO3 = 106.44 g/mol ; O2 = 32.00 g/mol

a)

256 g of O2

b)

576 g of O2

c)

288 g of O2

d)

384 g of O2

28.

Cl2 + 2KBr → Br2 + 2KCl

How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

KCl = 74.55 g/mol ; KBr = 119.00 g/mol

a)

749 g

b)

223 g

c)

479 g

d)

814 g

29.

From the reaction: B2H6 + 3O2 -->2 HBO2 + 2 H2O

What mass of O2 will be needed to burn 36.1 g of B2H6?

B2H6 = 27.68 g/mol

a)

13.8 g O2

b)

3.91 mol of O2

c)

125 g O2

d)

41.7 g O2

30.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
31.
The limiting reactant
a)
slows the reaction down
b)
is used up first
c)
is the reactant that is left over
d)
controls the speed of the reaction
32.
Use the equation 2 Al + 3 Cl2 ---> 2 AlCl3.  If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.
a)
AlCl3
b)
Cl2
c)
Al
33.
When does a chemical reaction stop?
a)
When the lab is finished
b)
When the excess reactant is used up
c)
When the limiting reactant is used up
d)
Chemical reactions never stop
34.
What is the limiting reactant if 10 moles of NH3  react  with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
a)
NH3
b)
NO
c)
N2
d)
water
35.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
36.
4NH3 + 5O2 --> 4NO + 6H2O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 
a)
0.37g
b)
0.045g
c)
1.35g
d)
11.1g
37.
P4 + 3O2 --> P4O6 
What is the limiting reactant is 12 moles of P4 react with 15 moles of O2?
a)
P4
b)
O2
c)
P4O6 
d)
none of the above
38.
How many grams of FeS are formed from 7.62g of Fe reacted with excess S?
a)
3.82g
b)
7.62g
c)
12.2g
d)
11.4g 
39.
P4 + 6Cl2 --> 4PCl3 
The reaction of 75.0g P4 with excess chlorine gas produces 110g PCl3 in lab. Find the theoretical yield and calculate percent yield for the reaction. 
a)
78%
b)
64%
c)
27%
d)
33%
40.
4Si + S8 --> 2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
41.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
42.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
43.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
44.
P4 + 3O2 --> 2P2O3
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
45.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
46.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
47.
H2SO4 + Fe -->H2 + FeSO4
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
48.
PbCl2 + AgNO3 ---> Pb(NO3)2 + AgCl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
49.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
50.
Which chemical reaction takes place when 2 substances react to form a single product?
a)
Decomposition
b)
Double Replacement
c)
Single Replacement
d)
Synthesis
51.

The compound with a pink square is known as a ___.

a)

Reactant

b)

Product

52.

What are the products of a combustion reaction?

a)

a single complex compound

b)

several simpler elements

c)

carbon dioxide and water

d)

carbon dioxide and hydrogen

53.

Which type of chemical reaction involves the production of a more complex compound from several simpler reactants?

a)

Decomposition

b)

Combustion

c)

Combination (or Synthesis)

d)

Single replacement

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