Dr. Herrick's CH221
Pressure Quiz 1

     

 

                              

Fundamentals
Copyright D. Herrick

 

20 Questions from past exams.
Practice for speed.  Aim for 1 minute per problem.

 

                              

1.

The bonding forces between atoms in a molecule tend to minimize their:

A) kinetic energy
B) potential energy
C) kinetic energy and potential energy

                              

2. The kinetic energy per molecule is highest in
A) solid oxygen B) liquid oxygen C) gaseous oxygen

                              

3. Oxygen (O2) and ozone (O3) are 
A) related by a physical change
B) related by a chemical change
C) structural isomers

 

4. The boiling point of oxygen (-239C) on the Kelvin scale is
A) 239  B) 512 C) -72 D) 34 E)  72

                              

5.

The heat capacity of one gram of water is 1.00 cal/C at 15C.  What is it in Joule/F?        (1 cal = 4.184 Joule)

A) 1.97 B) 0.133 C) 7.53 D) 0.430 E)  2.32

                                 

6.

In Centigrade the temperature of a reaction at 500F is

A) 900 B) 260 C) 278 D) 296 E) 468

                                 

7.

The radius of a hydrogen atom is 0.529 10-8 cm.  What is the diameter of the atom in pm?

A)  106. B) 105. C) 10.6 D) 10.5 E) 105.8

   

8.

What is the area (cm2) of a rectangle whose sides are measured to be 14.85 cm and 2.37cm?

A) 35.1945
B) 35.194
C) 35.19
D) 35.2
E) 35.

                              

9.

What is the total mass (kg) of three pieces of iron whose individual masses were measured to be 10.146 kg,   4.25 kg, and 12568. g?

A) 26.97
B) 27.0
C) 26.9
D) 26.96
E) 26.964

   

10. If the measured pH of a solution is 4.81 then 10-pH is
A) 1.56 10-5 
B) 1.55 10-5 
C) 1.54 10-5 

    

11. If PV = RT then T/V = 
A)  PR B)  P+R C)  P-R D)  R/P E)  P/R

  

12.

The mass percent of A in a two-component mixture of A and B is 43.15%.  What is the mass of B in 75.23 g of the mixture?  

A) 32.46 g
B) 56.85
C) 67.54
D) 42.77
E) 59.30

  

13.

Solve for x taking into account significant figures:
(5.66128 - 2.5943)(x + 0.12) = (24.1137)(8.8136)

A) 69.
B) 69.18
C) 69.176
D) 69.2
E) 69.1757

    

14. What is the volume of 15.33 g of material whose density is 1.672 g/mL?
A) 9.169 mL
B 9.1687
C 9.17
D) 9.16866
E) 9.2

  

15.

An atom has a radius of 10-8 cm and its nucleus has a radius of 10-13 cm.  If a model has a nuclear radius of 1. ft then the radius of the model atom in miles (1 mi = 5280 ft) is  

A) 180
B) 18.9
C) 20
D) 19
E) 189

  

Questions 16-20 should help you become more familiar with your calculator.

  

16.

In scientific notation 242.08 is 

A) 2.4208 10-2 
B) 2.4208 10-1 
C) 2.4208 
D) 2.4208 101
E) 2.4208 102

  

17.

Evaluate 3.414 (16.1846)2 taking into account significant figures.

A) 8.94268 102 
B) 8.9427 102 
C) 8.943 10
D) 8.94267 102 
E) 8.9426752 102

  

18.

Which number is closest to 9.65 10-2 ?

A) 103 
B) 10-2 
C) 10-3 
D) 10-1 
E) 102 

  

19.

 Evaluate 10-1.274.

A) 0.02744 
B) 0.05321
C) 0.06915 
D) 0.08247 
E) 0.16250 

  

20.

Evaluate  2.427 10-5 - 8.35 10-8.

A) 2.419 10-5 
B) 2.344 10-5 
C) 1.592 10-5 
D) 2.426 10-5 
E) 2.382 10-5 

  

                              

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   Copyright D. Herrick