UNE CHEM1010 Midterm Exam
Questions With 100% Solved
Solutions.
A comprehensive, testable explanation that explains a large body of experimental
data is a/an
A) Hypothesis
B) Law
C) Theory
D) Model - ANSWER-C) Theory
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 - ANSWER-B) Expands to completely fill a
container
Two or more types of matter that can be separated by physical changes is a/an
,A) Mixture
B) Compound
C) Molecule
D) Element - ANSWER-A) Mixture
Which of the following is a chemical change?
A) Cheese being shredded
B) Snow melting
C) Toast burning
D) Salt dissolving in water - ANSWER-C) Toast burning
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 decimal
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 - ANSWER-C) The number of
decimal places in the ANSWER will equal the fewest decimal places in a number in
the calculation
,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 - ANSWER-C) Accurate and precise
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 - ANSWER-A) 144.6
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 - ANSWER-C) 0.53
How many millimeters are in 0.24 km?
A) 2.4 x 102 mm
B) 2.4 x 10-4 mm
C) 2.4 x 10-7 mm
D) 2.4 x 105 mm - ANSWER-D) 2.4 x 105 mm
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 - ANSWER-A) 68.3 cm3
A tentative explanation of observations is a/an
A)Theory
B) Law
C) Model
D) Hypothesis - ANSWER-D) Hypothesis
Questions With 100% Solved
Solutions.
A comprehensive, testable explanation that explains a large body of experimental
data is a/an
A) Hypothesis
B) Law
C) Theory
D) Model - ANSWER-C) Theory
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 - ANSWER-B) Expands to completely fill a
container
Two or more types of matter that can be separated by physical changes is a/an
,A) Mixture
B) Compound
C) Molecule
D) Element - ANSWER-A) Mixture
Which of the following is a chemical change?
A) Cheese being shredded
B) Snow melting
C) Toast burning
D) Salt dissolving in water - ANSWER-C) Toast burning
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 decimal
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 - ANSWER-C) The number of
decimal places in the ANSWER will equal the fewest decimal places in a number in
the calculation
,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 - ANSWER-C) Accurate and precise
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 - ANSWER-A) 144.6
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 - ANSWER-C) 0.53
How many millimeters are in 0.24 km?
A) 2.4 x 102 mm
B) 2.4 x 10-4 mm
C) 2.4 x 10-7 mm
D) 2.4 x 105 mm - ANSWER-D) 2.4 x 105 mm
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 - ANSWER-A) 68.3 cm3
A tentative explanation of observations is a/an
A)Theory
B) Law
C) Model
D) Hypothesis - ANSWER-D) Hypothesis
