Name: _____________________________________ Date: _________________
CHM 1025, Spring 2017, Exam 1 Review Packet (Broward Teaching Center)
1. Which of the following isotopes has 15 protons, 16 neutrons, and 15 electrons?
a. 15Si
b. 29Si
c. 14Si
d. 31P
e. 14P
2. Which of the following is not a pure substance?
a. Rust (Fe2O3)
b. Table Salt (NaCl)
c. Baking Soda (NaHCO3)
d. Milk
e. Zinc Metal
3. Write 7,040,010,000,000,000 in scientific notation.
a. 7.04001 x 1015
b. 7.04 x 1015
c. 704 x 1012
d. 7040001 x 1010
e. 7 x 1015
4. Solve the following using the correct number of significant figures.
(20.54(14.567+7.8)) / (3.0002)
-3
a. 1.531292 x 10
b. 153
c. 1.53 x 10-3
d. 1.54 x 10-4
e. 1.531 x 10-3
5. A 100-g piece of metal is heated to 150C and dropped into 90 g of water at 45C. If the final
temperature of the water is 60C, what is the specific heat of the metal in J/gC?
a. 0.5273
b. 1.2321
c. 0.7263
d. 0.8231
e. 0.6276
6. An object was placed in a graduated cylinder filled with water. This caused the water level to rise to
6.12 ml from 1.2 ml. If the object has a mass of 0.05 lbs what is the density in g/cm3?
a. 1.16
b. 2.35
c. 4.61
d. 0.98
e. 1.87
7. The average atomic mass of strontium is calculated from two isotopes. 85Sr has a mass of 84.91 and
90Sr has a mass of 89.93. Use the atomic mass of strontium to calculate the abundance of 90Sr.
a. 0.54
b. 0.51
c. 0.50
d. 0.46
e. 0.41
8. How much energy in kJ can you acquire by burning 5g of protein, 15g of fat and 30 g of
carbohydrates?
a. 500
b. 120
c. 723
d. 1165
e. 392
9. It requires 4.33 kJ to raise the temperature of a 150g bar of copper (c=0.385 J/gC) from 100 C to
what?
a. 175 C
b. 165 C
c. 150 C
d. 145 C
e. 95 C
10. Which element is in period 3 and group 2
a. Na
b. K
c. Be
d. Li
e. Mg
11. When 1.0 g of gasoline burns, 11,500 cal of energy are given off. If the density of gasoline is 0.74 g/mL,
how many kilocalories of energy are obtained from 1.5 gal of gasoline?
a. 3.5 x 105
b. 2.4 x 106
c. 2.4 x 104
d. 4.8 x 106
e. 4.8 x 104
12. A bottle of mouthwash is 35% alcohol by mass. Assuming you obtained 150g of alcohol how many
liters of mouthwash did you require? (density of mouthwash is 0.876 g/mL)
a. 0.124 L
b. 0.489 L
c. 0.165 L
d. 0.726 L
e. 0.273 L
13. Convert 8.5 miles per hour (mi/h) into meters per second (m/s).
a. 3.80
b. 1.68
c. 2.56
d. 2.90
e. 4.11
14. You decide that you’d like to boil some benzene (density = 0.8765 g/cm3 , C = 1.74 J/ gC).
Unfortunately your thermometer is broken, but you know that to bring to boil 1 gallon of benzene
from 25.0°C it requires 318 kJ. What is the boiling point of benzene in °C?
a. 55.1
b. 42.3
c. 80.1
d. 30.1
e. 67.3
15. Convert -315.3 Fahrenheit to K.
a. 100
b. 80.2
c. 34.8
d. 112.4
e. 201.5
16. Using your formula sheet what would be the correct conversion factor for centimeters in a mile in
scientific notation?
a. 1.80 x 103 cm/mile
b. 1.27 x 105 cm/mile
c. 1.42 x 103 cm/mile
d. 1.61 x 105 cm/mile
e. 1.11 x 104 cm/mile
17. Which of the following statements is true?
a. Protons have a neutral charge.
b. The atomic mass of an element is the number of electrons and protons.
c. The last group of the periodic table houses the noble gases.
d. Kryptonite is an element.
e. Fahrenheit is an official SI unit.
18. Which of the following represents a chemical change?
a. You leave your bicycle outside and rust develops on the frame.
b. Short hair grows until it is long.
c. Water is boiled to cook pasta.
d. Carrots are grated into a salad.
e. Rip a sheet of paper in half then crumple the two pieces.
19. What is the density of gold assuming when you added a 100 g piece of gold to your graduated
cylinder, the water level rises from 10 mL to 15.18 mL?
a. 11.4 g/cm3
b. 19.3 g/cm3
c. 17.8 g/cm3
d. 11.8 g/cm3
e. 16.3 g/cm3
20. Which of the following elements are incorrectly matched to their chemical symbol?
a. Na - Sodium
b. Pb - Lead
c. Fe - Iron
d. B - Bromine
e. Au - Gold