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Exam 1 Review
Supplemental Instruction
Iowa State University
Allison
Chem 163
Dr. Appy
9/16/14
1. Define Matter:
2. Matter can exist as which of the following?
a. As a homogenous mixture of pure substances
b. A pure substance
c. As a heterogeneous mixture of pure substances
d. As all of the above
3. To be a compound, a substance must
a. Be made from more than one type of element
b. Not be a mixture
c. Be homogenous
d. Be all of the above
4. An element can also be a compound.
a. True
b. False
5. When a pure substance melts, it
a.
b.
c.
d.
Changes state
Changes from a liquid to solid
Sublimes
Undergoes a chemical change
6. Mud is an example of what type of matter?
a. Element
b. Compound
c. Homogenous mixture
d. Heterogeneous mixture
7. A KitKat bar melting is a(n) ______________________ .
a. Chemical change
b. Physical change
c. Unfortunate event
d. None of the above
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8. Chemical or physical change?
wood cut into pieces
rusted rail
burning gasoline
bended pipe
9. Heterogeneous or homogeneous mixture?
NaCl solution
sugar solution
metal alloy (brass)
orange juice with pulp in it
10. In a chemical reaction,
a. A physical change takes place
b. One or more substances are converted into different substances
c. Elemental substances change into different elements
11. Mickey and Minnie are measuring the height of liquid in a graduated cylinder.
Mickey’s measurements are 12.4 mL, 12.1 mL and 11.5 mL. Minnie’s
measurements are 12.0 mL, 12.1 mL, and 12.0 mL. If the actual measurement
is 12.0 mL, which of the following statements is correct?
a. Mickey’s measurements are more precise and more accurate.
b. Minnie’s measurements are more precise and more accurate
c. Mickey’s measurements are more precise, but Minnie’s are more
accurate
d. Minnie’s measurements are more precise, but Mickey’s are more
accurate
12. How many significant figures are in
a. 0.0678
b. 0.009050
c. 10090.0
d. 9.0
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13. Convert
a. 76.0 F to C
b. 13.7 C to F
14. Which of the following subatomic particles has the least mass?
a. Neutron
b. Electron
c. Proton
15. Isotopes of an element have the same number of ___________________________ but
different number of _____________________________.
16. Express each mass in grams, both in standard notation and scientific
notation:
a. 563 mg
b. 8.26 mg
c. 139 kg
17. It takes 487.5 J to heat 25.0g of Copper from 25.0 C to 75.0 C. What is the
specific heat in J/g C?
18. What is the heat in Joules required to raise the temperature of 25.0g of Water
from 0.0C to 100C? The specific heat of water = 4.18 J/g C
19. Gold has a Density of 19.30 g/mL. What is the volume (in mL) occupied by
1.20 lb of Gold? (1 lb = 454 g).
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20. 51.00 g of NaN2 decomposes to give 28.00 g of N. What is the percent
composition of N in NaN2?
21. True or False. Nonmetals tend to become cations?
22. Write the correct charge for each subatomic particle
a. Protons
b. Neutrons
c. Electrons
23. The red light from a helium-neon laser has a wavelength of 633 nm. What is
the energy of one photon?
24. Fill in the table
Protons
Neutrons
40
K+
19
F
40
Ca
31
P
4
Electrons
Net Charge