UNE CHEM1010
Midterm
1. A comprehensive, testable explanation that explains a large
body of exper-imental data is a/an
A) Hypothesis
B) Law
C) Theory
D) Model: C) Theory
2. A gas
A) Has fixed shape and volume
B) Expands to completely fill a container
C) Takes shape of a container and forms a horizontal upper surface
D) Is rigid and has a definite shape: B) Expands to completely fill a container
3. Two or more types of matter that can be separated by physical
changes is a/an
A) Mixture
B) Compound
C) Molecule
D) Element: A) Mixture
4. Which of the following is a chemical change?
A) Cheese being shredded
B) Snow melting
C) Toast burning
D) Salt dissolving in water: C) Toast burning
5. When adding or subtracting measurements
A)The number of decimal places in the answer will equal the
greatest decimal places in a number in the calculation
B) The number of significant figures in the answer will equal
the greatest significant figures in a number in the calculation
C) The number of decimal places in the answer will equal the fewest
, UNE CHEM1010
Midterm
decimal
, UNE CHEM1010
Midterm
places in a number in the calculation
D) The number of significant figures in the answer will equal the
fewest significant figures in a number in the calculation: C) The number of
decimal places in the answer will equal the fewest decimal places in a number in the
calculation
6. A Class-A 10 mL pipette is supposed to dispense 10.00 mL of
water. A lab technician makes three measurements of the volume
that the pipette actually dispenses, and obtains volumes of 10.01
mL, 9.99 mL, and 10.00 mL. The pipette is
A) Precise, but not accurate
B) Accurate, but not precise
C) Accurate and precise
D) Neither accurate or precise: C) Accurate and precise
7. What is the answer to 136.8 + 7.897 - 0.04, reported with the
correct number of significant figures?
A) 144.6
B) 144
C) 144.66
D) 144.657: A) 144.6
8. What is the answer to 5.763 x 0.111 ÷ 1.2, reported to the
correct number of significant figures?
A) 0.5330
B) 0.533
C) 0.53
D) 0.5: C) 0.53
9. How many millimeters are in 0.24 km?
A) 2.4 x 102 mm
B) 2.4 x 10-4 mm
, UNE CHEM1010
Midterm
C) 2.4 x 10-7 mm
D) 2.4 x 105 mm: D) 2.4 x 105 mm
10. The density of copper is 8.96 g/cm3. What is the volume
in cm3 of 1.35 pounds of copper?
A) 68.3 cm3
B) 3.32 x 10-4 cm3
C) 5.49 x 103 cm3
D) 2.67 x 10-2 cm3: A) 68.3 cm3
11. A tentative explanation of observations is a/an
A) Theory
B) Law
C) Model
D) Hypothesis: D) Hypothesis
12. A solid
A) Expands to completely fill a container
B) Takes shape of a container and forms a horizontal upper surface
C) Has fixed shape and volume
D) Flows when acted upon by gravity: C) Has fixed shape and volume
13. A pure substance that cannot be broken down into simpler
substances by chemical changes is a/an
A) Mixture
B) Compound
C) Solution
D) Element: D) Element
14. Which of the following is a physical change?
A) Toast burning
B) A garden tool rusting
Midterm
1. A comprehensive, testable explanation that explains a large
body of exper-imental data is a/an
A) Hypothesis
B) Law
C) Theory
D) Model: C) Theory
2. A gas
A) Has fixed shape and volume
B) Expands to completely fill a container
C) Takes shape of a container and forms a horizontal upper surface
D) Is rigid and has a definite shape: B) Expands to completely fill a container
3. Two or more types of matter that can be separated by physical
changes is a/an
A) Mixture
B) Compound
C) Molecule
D) Element: A) Mixture
4. Which of the following is a chemical change?
A) Cheese being shredded
B) Snow melting
C) Toast burning
D) Salt dissolving in water: C) Toast burning
5. When adding or subtracting measurements
A)The number of decimal places in the answer will equal the
greatest decimal places in a number in the calculation
B) The number of significant figures in the answer will equal
the greatest significant figures in a number in the calculation
C) The number of decimal places in the answer will equal the fewest
, UNE CHEM1010
Midterm
decimal
, UNE CHEM1010
Midterm
places in a number in the calculation
D) The number of significant figures in the answer will equal the
fewest significant figures in a number in the calculation: C) The number of
decimal places in the answer will equal the fewest decimal places in a number in the
calculation
6. A Class-A 10 mL pipette is supposed to dispense 10.00 mL of
water. A lab technician makes three measurements of the volume
that the pipette actually dispenses, and obtains volumes of 10.01
mL, 9.99 mL, and 10.00 mL. The pipette is
A) Precise, but not accurate
B) Accurate, but not precise
C) Accurate and precise
D) Neither accurate or precise: C) Accurate and precise
7. What is the answer to 136.8 + 7.897 - 0.04, reported with the
correct number of significant figures?
A) 144.6
B) 144
C) 144.66
D) 144.657: A) 144.6
8. What is the answer to 5.763 x 0.111 ÷ 1.2, reported to the
correct number of significant figures?
A) 0.5330
B) 0.533
C) 0.53
D) 0.5: C) 0.53
9. How many millimeters are in 0.24 km?
A) 2.4 x 102 mm
B) 2.4 x 10-4 mm
, UNE CHEM1010
Midterm
C) 2.4 x 10-7 mm
D) 2.4 x 105 mm: D) 2.4 x 105 mm
10. The density of copper is 8.96 g/cm3. What is the volume
in cm3 of 1.35 pounds of copper?
A) 68.3 cm3
B) 3.32 x 10-4 cm3
C) 5.49 x 103 cm3
D) 2.67 x 10-2 cm3: A) 68.3 cm3
11. A tentative explanation of observations is a/an
A) Theory
B) Law
C) Model
D) Hypothesis: D) Hypothesis
12. A solid
A) Expands to completely fill a container
B) Takes shape of a container and forms a horizontal upper surface
C) Has fixed shape and volume
D) Flows when acted upon by gravity: C) Has fixed shape and volume
13. A pure substance that cannot be broken down into simpler
substances by chemical changes is a/an
A) Mixture
B) Compound
C) Solution
D) Element: D) Element
14. Which of the following is a physical change?
A) Toast burning
B) A garden tool rusting
