CHEM 104 FINAL EXAM QUESTIONS
AND ANSWERS. VERIFIED 2026.
1) Significant figures are important because they indicate
A) the number of measurements.
B) the number of digits on a calculator.
C) the accuracy of the conversion factor.
D) the exact numbers in a measurement.
E) the certain and estimated digits in a measurement. - ANS E) the certain and estimated
digits in a measurement.
2) The number of significant figures in the measurement of 45.030 mm is
A) none.
B) three.
C) four.
D) five.
E) six. - ANS D) five.
3) Which of the following examples illustrates a number that is correctly rounded to three
significant figures?
A) 20.0332 grams to 20.0 grams
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,B) 4.05438 grams to 4.054 grams
C) 103.692 grams to 103.7 grams
D) 109,526 grams to 109 500 grams
E) 0.03954 grams to 0.040 grams - ANS A) 20.0332 grams to 20.0 grams
4) What is the correct answer for the calculation of a volume (in mL) with measured numbers?
28.58/16x8.02
A) 0.22 mL
B) 14 mL
C) 0.223 mL
D) 14.3 mL
E) 57 mL - ANS A) 0.22 mL
5) The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is A) 10 g.
B) 13 g.
C) 13.0 g.
D) 13.071 g.
E) 13.1 g. - ANS B) 13 g.
6) Which of the following measurements are NOT equivalent?
A) 183 L = 0.183 kL
B) 24 dL = 2.4 L
C) 84 cm = 8.4 mm
D) 25 mg = 0.025 g
E) 150. ms = 0.150 s - ANS C) 84 cm = 8.4 mm
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, 7) Which of the following is the largest unit?
A) millimeter
B) kilometer
C) micrometer
D) decimeter
E) meter - ANS B) kilometer
8) How many kilograms are in 30.4 lb? 1 kg = 2.20 lb
A) 66.88 kg
B) 66.9 kg
C) 13.8 kg
D) 67 kg
E) 14 kg - ANS C) 13.8 kg
9) A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0
mL. How many milliliters of the suspension are required?
A) 6.3 mL
B) 0.0063 mL
C) 0.0025 mL
D) 3.0 mL
E) 2.5 mL - ANS E) 2.5 mL
10) A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a
volume of 77.0 mL. What is the density of the gold?
A) 10.4 g/mL
B) 0.0518 g/mL
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
AND ANSWERS. VERIFIED 2026.
1) Significant figures are important because they indicate
A) the number of measurements.
B) the number of digits on a calculator.
C) the accuracy of the conversion factor.
D) the exact numbers in a measurement.
E) the certain and estimated digits in a measurement. - ANS E) the certain and estimated
digits in a measurement.
2) The number of significant figures in the measurement of 45.030 mm is
A) none.
B) three.
C) four.
D) five.
E) six. - ANS D) five.
3) Which of the following examples illustrates a number that is correctly rounded to three
significant figures?
A) 20.0332 grams to 20.0 grams
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,B) 4.05438 grams to 4.054 grams
C) 103.692 grams to 103.7 grams
D) 109,526 grams to 109 500 grams
E) 0.03954 grams to 0.040 grams - ANS A) 20.0332 grams to 20.0 grams
4) What is the correct answer for the calculation of a volume (in mL) with measured numbers?
28.58/16x8.02
A) 0.22 mL
B) 14 mL
C) 0.223 mL
D) 14.3 mL
E) 57 mL - ANS A) 0.22 mL
5) The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is A) 10 g.
B) 13 g.
C) 13.0 g.
D) 13.071 g.
E) 13.1 g. - ANS B) 13 g.
6) Which of the following measurements are NOT equivalent?
A) 183 L = 0.183 kL
B) 24 dL = 2.4 L
C) 84 cm = 8.4 mm
D) 25 mg = 0.025 g
E) 150. ms = 0.150 s - ANS C) 84 cm = 8.4 mm
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 7) Which of the following is the largest unit?
A) millimeter
B) kilometer
C) micrometer
D) decimeter
E) meter - ANS B) kilometer
8) How many kilograms are in 30.4 lb? 1 kg = 2.20 lb
A) 66.88 kg
B) 66.9 kg
C) 13.8 kg
D) 67 kg
E) 14 kg - ANS C) 13.8 kg
9) A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0
mL. How many milliliters of the suspension are required?
A) 6.3 mL
B) 0.0063 mL
C) 0.0025 mL
D) 3.0 mL
E) 2.5 mL - ANS E) 2.5 mL
10) A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a
volume of 77.0 mL. What is the density of the gold?
A) 10.4 g/mL
B) 0.0518 g/mL
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
