Taking exams can be a time for stress and anxiety if you have not studied during the quarter; you will find yourself cramming for each test and studying late into the night. With a little time management, you not only minimize stress at exam time, but maximize productivity and results!
... And with this, I have prepared a reviewer for all you Chemistry Pals out there! All you have to do is take this mock test within a time limit. Get into the exam mode by clearing your work desk of everything except your paper and pen.
Source: Chemistry Text
Here's a practice worksheet for Metric Conversion.
Answers are shown on the right side of every item :)
Source: http://www.regentsprep.org/regents/core/questions
Hello fellow Chemistry lovers! This part covers Chapters 1 and 2 of your text book.
In case you've read the two chapters five times already, well here's a supplementary exercise for you. Try to answer this in 25 minutes... Have fun!
. Multiple choice (Answer to the questions will follow)
1. A hypothesis is...
a. a tentative explanation for a natural phenomenon
b. a description of a pattern or relationship in experimental data
c. a theory that has been proved
d. obeyed under any circumstances
2. The statement, "A chemical reaction never creates a product that weight more or less than the reactants", is based on three centuries of experimental observation. The statement is an example of:
a. a hypothesis b. a theory c. a datum d. a law
3. A number of people become ill after eating dinner in a restaurant. Which of the following statements is a hypothesis?
a. People got sick whether the oysters were raw or cooked.
b. Bacteria in the oysters may have caused the illness
c. Everyone who ate oysters got sick
d. The cook felt really bad about it
e. Symptoms include nausea and dizziness
4. The number of significant digits in 650600000 is
a. at most 4 b. exactly 9 c. exactly 3 d. at least 9 e. exactly 4
5. Rounded correctly, 2.000 cm x 10.0 cm =
a. 20 cm^2 b. 20.00 cm^2 c. 20.0 cm^2 d. 20.000 cm^2
6. How many significant figures in a measured mass of 0.010010 g?
a. 3 b. 1 c. 5 d. 0
7. Which of the following is a chemical property of a slice of chocolate cake?
a. dietary calories b. mass c. color d. temperature e. volume
8. Which of the following is an extensive (extrinsic) property of coffee in a mug?
a. temperature b. color c. percent sugar d. total mg of caffeine
9. Which of the following is an intensive (intrinsic) property?
a. volume b. number of atoms c. mass d. density e. weight
10. Which of the following is a physical property?
a. explosiveness b. corrosiveness c. flammability d. temperature
11. In order to decide whether a property is physical or chemical, you must know whether
a. chemical or physical changes occur when property is measured
b. the property involves matter or energy
c. the property in extrinsic or intrinsic
d. measuring the property changes mass or energy
e. the property in extensive or intensive
12. Solid melts gradually between 85 degrees Celsius and 95 degrees Celsius to give a milky, oily liquid. When a laser beam shines through the liquid, the path of light beam is clearly visible. The milky liquid is likely to be:
a. heterogeneous mixture b. an element c. a compound d. a solution
13. Smoke is an example of a (an):
a. gaseous solution
b. heterogeneous mixture
c. element
d. compound
e. homogeneous mixture
14. The meteorite ALH84001 contains tiny bubbles trapped in the rock. The chemical composition of the gas in these bubbles matches the composition of the Martian atmosphere as determined by the Viking spacecraft in the 1970's. The meteorite is an example of a(an):
a. solution
b. element
c. homogeneous mixture
d. heterogeneous mixture
e. binary compound
15. Antoine Lavoisier, the "Father of Chemistry", listed lime (lime = calcium oxide, not the fruit!)as a chemical element in his table of 33 known elements. Which of the following observations shows that lime cannot be an element?
a. when a certain soft metal is burned in oxygen, lime is produced (with no other products)
b. lime and carbon dioxide are produced when limestone is roasted
c. lime reacts with water, generating a large amount of heat
d. lime melts at a temperature of 2572 degrees Celsius
16. A blue crystalline material is heated strongly in a test tube. A clear liquid condenses around the mouth of the test tube and the crystals gradually lose their blue color and become white powder. Every grain of blue crystal produces 0.36 g of clear liquid and 0.64 g of colorless powder. The same weight relationships are observed for samples of the crystals taken from many different sources. These observations are consistent with the hypothesis that the blue crystals are:
a. a solution
b. a compound
c. a wet salt
d. an element
e. a heterogeneous mixture
17. A measurement that closely agrees with accepted values is said to be
a. accurate
b. precise
c. reliable
d. significant
18. A student measure the mass of one mole of Carbon and finds it to be 12.22 grams. If the accepted value is 12.11 grams, what is the student % error?
a. 0.0091%
b. 0.091%
c. 0.91%
d. 9.1%
19. 3 groups of students measures the mass of a product from the same chemical reaction. The groups recorded the data of 8.83 g, 8.84 g and 8.82 g. The known mass of the product from the reaction is 8.80g. The group values are
a. accurate
b. precise
c. precise and accurate
d. neither precise nor accurate
20. As ice cools from 273 K to 263 K, the average kinetic energy of its molecules will
a. decrease
b. increase
c. remain the same
d. there is no kinetic energy in ice molecules
21. The phase change represented by the vaporization of iodine crystals is called
a. boiling
b. condensation
c. melting
d. sublimation
22. Which substance cannot be decomposed into simpler substances?
a. ammonia
b. aluminum
c. methane
d. ethanol
23. Which statement describes a chemical property?
a. its crystals are metallic gray
b. it dissolves in alcohol
c. it forms violet-colored gas
d. it reacts with hydrogen to form a gas
24. Petroleum is classified chemically as a
a. a substance
b. a compound
c. an element
d. a mixture
25. A student investigated the physical and chemical properties of a sample of unknown gas. Which statement represents a conclusion rather than an experimental observation?
a. the gas is colorless
b. the gas is carbon dioxide
c. when gas bubbled in lime water, the liquid becomes cloudy
d. when placed in the gas, the flaming splint stops burning
26. What is the sum of 6.6412 g + 12.85 g + 0.046 g + 3.48 g expressed to the correct number of significant figures?
a. 23 g
b. 23.0 g
c. 23.02 g
d. 23.017 g
27. What occurs as potassium nitrate is dissolved in a beaker of water, indicating that the process is endothermic?
a. the temperature of the solution decreases
b. the temperature of the solution increases
c. the solution changes color
d. the solution gives off gas
28. In a laboratory exercise to determine the volume of a mole of a gas at STP, a student determines the volume to be 2.25 liters greater than the accepted value of 22.4 liters. The percent error in the student's value is
a. 2.25%
b. 10.0%
c. 20.2%
d. 24.7%
29. To determine the density of an irregularly shaped object, a student immersed the object in 21.2 milliliters of H2O in a graduated cylinder, causing the level of the H2O to rise to 27.8 milliliters. If the object had a mass of 22.4 grams, what was the density of the object.
a. 27.8 g/ml
b. 6.6 g/ml
c. 3.4 g/ml
d. 34. g/ml
30. Under the same conditions of temperature and pressure, a liquid differs from a gas because the particles of the liquid
a. are in constant linear motion
b. take the shape of the container they occupy
c. have no regular arrangement
d. have stronger forces of attraction between them
ANSWERS FOR NUMBERS 1-30
a
d
b
e
c
c
a
d
d
d
a
a
b
d
a
b
a
c
c
a
d
b
d
d
b
c
b
b
c
d
... And with this, I have prepared a reviewer for all you Chemistry Pals out there! All you have to do is take this mock test within a time limit. Get into the exam mode by clearing your work desk of everything except your paper and pen.
METRIC CONVERSION WORKSHEET
Time Limit: 30 minutesSource: Chemistry Text
Here's a practice worksheet for Metric Conversion.
Answers are shown on the right side of every item :)
- One-Step Metric Conversions
- 34.5 cm to m (0.345 m)
- 56.8 km to m (56800 m)
- 987 mm to m (0.987 m)
- 0.981 seconds to centiseconds (98.1 cs)
- 0.0872 kg to g (87.2 g)
- 75600 microliters to liters (0.0756 L)
- 9800 liters to kiloliters (9.8 kL)
- 0.560 seconds to microseconds (560,000 µs)
- 7960 centigrams to grams (79.6 g)
- 89.5 megawatts to watts (89,500,000 watts)
- Two-Step Conversion (When in doubt, first convert to the standard grams, liters, seconds, meters…)
- 34.5 km to cm (3,450,000 cm)
- 56800 cm to km (0.568 km)
- 987,000 mm to km (0.987 km)
- 0.981 kiloseconds to centiseconds (98,100 cs)
- 0.0872 kg to mg (87,200 mg)
- Numerator and Denominator Conversions
- 30.0 m/s to km/min (1.8 km/min)
- 15.6 km/hr to m/s (4.33 m/s)
- 0.0098 L/min to mL/s (0.16 mL/s)
- 46.7 kg/hr to g/sec (13.0 g/sec)
- 2.3 km/hr to m/day (55,200 m/day)
- Area and Volume Conversions
- 5.0 mm3 to m3 (0.00000005 m3)
- 67.3 µm2 to m2 ( 6.73 x 10-11 m2)
MOCK TEST FOR CHAPTERS 1 AND 2
Time Limit: 25 minutesSource: http://www.regentsprep.org/regents/core/questions
Hello fellow Chemistry lovers! This part covers Chapters 1 and 2 of your text book.
In case you've read the two chapters five times already, well here's a supplementary exercise for you. Try to answer this in 25 minutes... Have fun!
. Multiple choice (Answer to the questions will follow)
1. A hypothesis is...
a. a tentative explanation for a natural phenomenon
b. a description of a pattern or relationship in experimental data
c. a theory that has been proved
d. obeyed under any circumstances
2. The statement, "A chemical reaction never creates a product that weight more or less than the reactants", is based on three centuries of experimental observation. The statement is an example of:
a. a hypothesis b. a theory c. a datum d. a law
3. A number of people become ill after eating dinner in a restaurant. Which of the following statements is a hypothesis?
a. People got sick whether the oysters were raw or cooked.
b. Bacteria in the oysters may have caused the illness
c. Everyone who ate oysters got sick
d. The cook felt really bad about it
e. Symptoms include nausea and dizziness
4. The number of significant digits in 650600000 is
a. at most 4 b. exactly 9 c. exactly 3 d. at least 9 e. exactly 4
5. Rounded correctly, 2.000 cm x 10.0 cm =
a. 20 cm^2 b. 20.00 cm^2 c. 20.0 cm^2 d. 20.000 cm^2
6. How many significant figures in a measured mass of 0.010010 g?
a. 3 b. 1 c. 5 d. 0
7. Which of the following is a chemical property of a slice of chocolate cake?
a. dietary calories b. mass c. color d. temperature e. volume
8. Which of the following is an extensive (extrinsic) property of coffee in a mug?
a. temperature b. color c. percent sugar d. total mg of caffeine
9. Which of the following is an intensive (intrinsic) property?
a. volume b. number of atoms c. mass d. density e. weight
10. Which of the following is a physical property?
a. explosiveness b. corrosiveness c. flammability d. temperature
11. In order to decide whether a property is physical or chemical, you must know whether
a. chemical or physical changes occur when property is measured
b. the property involves matter or energy
c. the property in extrinsic or intrinsic
d. measuring the property changes mass or energy
e. the property in extensive or intensive
12. Solid melts gradually between 85 degrees Celsius and 95 degrees Celsius to give a milky, oily liquid. When a laser beam shines through the liquid, the path of light beam is clearly visible. The milky liquid is likely to be:
a. heterogeneous mixture b. an element c. a compound d. a solution
13. Smoke is an example of a (an):
a. gaseous solution
b. heterogeneous mixture
c. element
d. compound
e. homogeneous mixture
14. The meteorite ALH84001 contains tiny bubbles trapped in the rock. The chemical composition of the gas in these bubbles matches the composition of the Martian atmosphere as determined by the Viking spacecraft in the 1970's. The meteorite is an example of a(an):
a. solution
b. element
c. homogeneous mixture
d. heterogeneous mixture
e. binary compound
15. Antoine Lavoisier, the "Father of Chemistry", listed lime (lime = calcium oxide, not the fruit!)as a chemical element in his table of 33 known elements. Which of the following observations shows that lime cannot be an element?
a. when a certain soft metal is burned in oxygen, lime is produced (with no other products)
b. lime and carbon dioxide are produced when limestone is roasted
c. lime reacts with water, generating a large amount of heat
d. lime melts at a temperature of 2572 degrees Celsius
16. A blue crystalline material is heated strongly in a test tube. A clear liquid condenses around the mouth of the test tube and the crystals gradually lose their blue color and become white powder. Every grain of blue crystal produces 0.36 g of clear liquid and 0.64 g of colorless powder. The same weight relationships are observed for samples of the crystals taken from many different sources. These observations are consistent with the hypothesis that the blue crystals are:
a. a solution
b. a compound
c. a wet salt
d. an element
e. a heterogeneous mixture
17. A measurement that closely agrees with accepted values is said to be
a. accurate
b. precise
c. reliable
d. significant
18. A student measure the mass of one mole of Carbon and finds it to be 12.22 grams. If the accepted value is 12.11 grams, what is the student % error?
a. 0.0091%
b. 0.091%
c. 0.91%
d. 9.1%
19. 3 groups of students measures the mass of a product from the same chemical reaction. The groups recorded the data of 8.83 g, 8.84 g and 8.82 g. The known mass of the product from the reaction is 8.80g. The group values are
a. accurate
b. precise
c. precise and accurate
d. neither precise nor accurate
20. As ice cools from 273 K to 263 K, the average kinetic energy of its molecules will
a. decrease
b. increase
c. remain the same
d. there is no kinetic energy in ice molecules
21. The phase change represented by the vaporization of iodine crystals is called
a. boiling
b. condensation
c. melting
d. sublimation
22. Which substance cannot be decomposed into simpler substances?
a. ammonia
b. aluminum
c. methane
d. ethanol
23. Which statement describes a chemical property?
a. its crystals are metallic gray
b. it dissolves in alcohol
c. it forms violet-colored gas
d. it reacts with hydrogen to form a gas
24. Petroleum is classified chemically as a
a. a substance
b. a compound
c. an element
d. a mixture
25. A student investigated the physical and chemical properties of a sample of unknown gas. Which statement represents a conclusion rather than an experimental observation?
a. the gas is colorless
b. the gas is carbon dioxide
c. when gas bubbled in lime water, the liquid becomes cloudy
d. when placed in the gas, the flaming splint stops burning
26. What is the sum of 6.6412 g + 12.85 g + 0.046 g + 3.48 g expressed to the correct number of significant figures?
a. 23 g
b. 23.0 g
c. 23.02 g
d. 23.017 g
27. What occurs as potassium nitrate is dissolved in a beaker of water, indicating that the process is endothermic?
a. the temperature of the solution decreases
b. the temperature of the solution increases
c. the solution changes color
d. the solution gives off gas
28. In a laboratory exercise to determine the volume of a mole of a gas at STP, a student determines the volume to be 2.25 liters greater than the accepted value of 22.4 liters. The percent error in the student's value is
a. 2.25%
b. 10.0%
c. 20.2%
d. 24.7%
29. To determine the density of an irregularly shaped object, a student immersed the object in 21.2 milliliters of H2O in a graduated cylinder, causing the level of the H2O to rise to 27.8 milliliters. If the object had a mass of 22.4 grams, what was the density of the object.
a. 27.8 g/ml
b. 6.6 g/ml
c. 3.4 g/ml
d. 34. g/ml
30. Under the same conditions of temperature and pressure, a liquid differs from a gas because the particles of the liquid
a. are in constant linear motion
b. take the shape of the container they occupy
c. have no regular arrangement
d. have stronger forces of attraction between them
ANSWERS FOR NUMBERS 1-30
a
d
b
e
c
c
a
d
d
d
a
a
b
d
a
b
a
c
c
a
d
b
d
d
b
c
b
b
c
d
