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Final Exam Review 2
Test Description: Final exam review
Instructions: Answer all questions to get your test result.
1) Select the particle(s) that account for 99.99% of the mass of atoms other than hydrogen.
A
electrons
B
electrons and neutrons
C
protons
D
protons and neutrons
2) When iron rusts it undergoes a chemical reaction and becomes iron oxide. Select the number of electrons gained or lost by every oxygen atom that is converted into the new compound.
A
lose 4
B
gain 2
C
gain 3
D
lose 2
3) Carl has a Ziploc bag that contains 10 g of water. He drops 2 seltzer tablets in the bag and closes the bag quickly. If each seltzer tablet has a mass of 2.5 g, what is the mass of the bag and it's remains at the end of the experiment?
A
there's not enough information to determine the mass
B
1.5 g
C
15 g
D
between 9 and 12 g
4) Select the change that will decrease the rate at which a solid solute dissolves in liquid solvent.
A
shaking the solvent
B
cooling the solvent
C
cutting the solvent into tiny pieces
D
stirring the solvent
5) As water changes phases from liquid to gas, what is expected to happen?
A
the mass of the sample will decrease
B
the distance between the particles will increase
C
the distance between the particles will decrease
D
the mass of the sample will increase
6) Name the process the following statement describes: A wet sidewalk begins to steam in the sun after a spring shower on a warm, sunny day.
A
melting
B
sublimation
C
vaporization
D
condensation
7) Describe the conversion of energy in the following process: Nuclear power reactors utilize the process of uranium fission to produce heat.
A
nuclear to mechanical
B
nuclear to electrical
C
thermal to nuclear
D
nuclear to thermal
8) Which of the following elements has the fewest electrons?
A
helium
B
sodium
C
lead
D
nitrogen
9) Marla has three balls. Ball A has a mass of 19 g. Ball B has a mass of 1 kilogram. Ball C has a mass of 300 g. In the absence of air resistance, which ball will accelerate the fastest to the ground?
A
They will accelerate at the same rate
B
Ball B
C
Ball A
D
Ball C
10) An example of using a lever is
A
using a fork to scramble an egg
B
using a ramp to push a barrel into a pickup truck
C
using a screwdriver to pry the lid of a can of paint
D
using a big spoon to stir a bowl of soup
11) Seawater contains sodium chloride and other dissolved salts. Identify the term that correctly describes those dissolved salts.
A
elements
B
solvents
C
mixtures
D
solutes
12) Identify the voltage needed to establish a current of .25 A in a circuit with a total resistance of 10 ohms.
A
9.75 V
B
2.5 V
C
10.25 V
D
.025 V
13) ROYGBIV describes the visible light portion of the electromagnetic spectrum, with red light (R) at one end and violet light (V) at the other. Which of the following statements is true?
A
Violet light has a lower frequency and shorter wavelength than red light.
B
Violet light has a lower frequency and longer wavelength than red light.
C
Violet light has a higher frequency and longer wavelength than red light.
D
Violet light has a higher frequency and shorter wavelength than red light.
*select an answer for all questions
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