Chem 1406 Final

5.21 cm is the same distance as A) 0.0521 m. B) 52.1 dm. C) 5.21 mm. D) 0.00521 km. E) 5210 m.

A

What is the correct answer for the calculation of a volume (in mL) with measured numbers ? A) 0.22 mL B) 0.223 mL C) 57 mL D) 14 mL E) 14.3 mL

A

Which of the following is the basic unit of volume in the metric system? A) liter B) kilogram C) meter D) centimeter E) gram

A

A calculator answer of 423.6059 must be rounded off to three significant figures. What answer is reported? A) 423 B) 424 C) 420 D) 423.6 E) 423.7

B

In which of the following is the metric unit paired with its correct abbreviation? A) microgram / mg B) milliliter / mL C) centimeter / km D) kilogram / cg E) gram / gm

B

The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is A) 13.071 g. B) 13 g. C) 13.0 g. D) 10 g. E) 13.1 g.

B

The measurement 0.000 0043 m, expressed correctly using scientific notation, is A) 4.3 x 10-7 m. B) 4.3 x 10-6 m. C) 4.3 x 106 m. D) 0.43 x 10-5 m. E) 4.3 m.

B

The measurement of the gravitational pull on an object is its A) volume. B) weight. C) mass. D) length. E) size

B

A value of 25 °C is a measurement of A) distance. B) volume. C) temperature. D) mass. E) density

C

How many centimeters are there in 57.0 in.? A) 22 cm B) 0.0445 cm C) 145 cm D) 22.4 cm E) 140 cm

C

How many significant figures are in the number 0.00208? A) six B) two C) three D) four E) five

C

The number 680 000 000 expressed correctly using scientific notation is A) 6.8. B) 0.68 x 106. C) 6.8 x 108. D) 68 x 107. E) 680 x 106.

C

Which of the answers for the following conversions contains the correct number of significant figures? A) 2.543 m × = 100.1942 in B) 2 L × = 2.12 qt C) 24.95 min × = 0.4158 hr D) 12.0 ft × x = 370 cm E) 24.0 kg × = 11 lb

C

Which of the following has the smallest mass? A) 4.0 x 10-6 g B) 4.0 x 109 ng C) 4.0 x 10-2 μg D) 4.0 x 10-3 kg E) 4.0 x 10-6 mm

C

Which of the following is a measurement of mass in the SI system? A) milliliter B) centimeter C) kilogram D) Celsius E) meter

C

Which of the following measurements has three significant figures? A) 0.005 m B) 510 m C) 0.510 m D) 0.051 m E) 5100 m

C

Which of the following numbers contains the designated CORRECT number of significant figures? A) 0.04300 5 significant figures B) 0.00302 2 significant figures C) 156 000 3 significant figures D) 1.04 2 significant figures E) 3.0650 4 significant figures

C

The number of significant figures in the measurement of 45.030 mm is A) none. B) three. C) four. D) five. E) six.

D

What is the answer, with the correct number of significant figures, for this problem? 4.392 g + 102.40 g + 2.51 g = A) 109.302 g B) 109 g C) 109.3 g D) 109.30 g E) 110 g

D

When 2610 + 11.7 + 0.22 are added, the answer to the correct number of decimal places is __________. A) 2621.92 B) 2621.9 C) 2621 D) 2620 E) 2600

D

Which of the following conversion factors is a measured number? A) 10 cm/dm B) 12 in/ft C) 16 oz/lb D) 25 miles/gallon E) 12 eggs/dozen

D

Which of the following is a measurement of mass in the metric system? A) oz B) lb C) Celsius D) kilogram E) meter

D

Which of the following measurements are NOT equivalent? A) 25 mg = 0.025 g B) 183 L = 0.183 kL C) 150 msec = 0.150 sec D) 84 cm = 8.4 mm E) 24 dL = 2.4 L

D

Which of the following numbers is the largest? A) 2.05 x 103 B) 2.05 x 10-12 C) 2.05 x 105 D) 2.05 x 108 E) 2.05

D

A researcher needed three samples of sodium chloride solution, each with a volume of 0.03510 mL. The total volume needed should be reported as A) 0.105 mL. B) 0.0105 mL. C) 0.10 mL. D) 0.1053 mL. E) 0.1100 mL.

D

A value of 36 mL is a measure of A) density B) mass C) temperature D) volume E) distance

D

Significant figures are important because they indicate A) the accuracy of a measurement. B) the number of digits on a calculator. C) the number of measurements. D) the precision of a measurement. E) the accuracy of the conversion factor

D

A value of 345 mm is a measure of A) density B) mass C) temperature D) volume E) distance

E

The amount of space occupied by a substance is its A) mass. B) density. C) weight. D) length. E) volume.

E

Which of the following examples illustrates a number that is correctly rounded to three significant figures? A) 4.05438 grams to 4.054 grams B) 0.03954 grams to 0.040 grams C) 103.692 grams to 103.7 grams D) 109,526 grams to 109 500 grams E) 20.0332 grams to 20.0 grams

E

Which of the following is the largest unit? A) millimeter B) micrometer C) meter D) decimeter E) kilometer

E

Which of the following numbers is the smallest? A) 4.0 x 10-6 B) 4.0 x 10-8 C) 4.0 x 10-2 D) 4.0 x 1015 E) 4.0 x 10-12

E