Question 1

The number 243.306 rounded off to five significant figures is

Accepted Answer

A)  243.31 
B)  243.36 
C)  243.30 
D)  243.00 
E)  none of these 
A)  243.31 
B)  243.36 
C)  243.30 
D)  243.00 
E)  none of these

Question 2

An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of 74.2 mL of ethyl alcohol?

Accepted Answer

A)  93.9 g 
B)  10.6 g 
C)  58.6 g 
D)    g 
E)  none of these 
A)  93.9 g 
B)  10.6 g 
C)  58.6 g 
D)    g 
E)  none of these

Question 3

How many milliliters are in 0.070 L?

Accepted Answer

A)  0.70 mL 
B)  7.0 mL 
C)    mL 
D)    mL 
E)    mL 
A)  0.70 mL 
B)  7.0 mL 
C)    mL 
D)    mL 
E)    mL

Question 4

How many millimeters are in   centimeters?

Accepted Answer

A)    mm 
B)    mm 
C)    mm 
D)  8.63 mm 
E)    mm 
A)    mm 
B)    mm 
C)    mm 
D)  8.63 mm 
E)    mm

Question 5

How many significant figures are in the number 3.400?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 6

Convert: -97.7°C = ____________ K.

Accepted Answer

A)  -370.7 K 
B)  370.7 K 
C)  175.3 K 
D)  175.9 K 
E)  54.3 K 
A)  -370.7 K 
B)  370.7 K 
C)  175.3 K 
D)  175.9 K 
E)  54.3 K

Question 7

Convert: 904.4 mm = ______________ m.

Accepted Answer

A)    m 
B)    m 
C)  9.044 m 
D)  90.44 m 
E)  0.9044 m 
A)    m 
B)    m 
C)  9.044 m 
D)  90.44 m 
E)  0.9044 m

Question 8

Convert: 15.3°F = _______________ °C.

Accepted Answer

A)  26.28°C 
B)  -30.06°C 
C)  -9.28°C 
D)  85.14°C 
E)  288.3°C 
A)  26.28°C 
B)  -30.06°C 
C)  -9.28°C 
D)  85.14°C 
E)  288.3°C

Question 9

Convert 17.2 cm to inches (2.54 cm = 1 in).

Accepted Answer

A)  43.7 in 
B)  4.37 in 
C)  6.77 in 
D)  67.7 in 
E)  0.677 in 
A)  43.7 in 
B)  4.37 in 
C)  6.77 in 
D)  67.7 in 
E)  0.677 in

Question 10

If a 100.-g sample of platinum metal has a volume of 4.671 mL, what is the density of platinum in g/cm3?

Accepted Answer

A)  21.4 g/cm3 
B)  2.14 g/cm3 
C)  0.0467 g/cm3 
D)  467 g/cm3 
E)  none of these 
A)  21.4 g/cm3 
B)  2.14 g/cm3 
C)  0.0467 g/cm3 
D)  467 g/cm3 
E)  none of these

Question 11

Convert: 0.326 mm = ____________ m.

Accepted Answer

A)    m 
B)    m 
C)    m 
D)  32.6 m 
E)    m 
A)    m 
B)    m 
C)    m 
D)  32.6 m 
E)    m

Question 12

Express 1840000 in scientific notation.

Accepted Answer

A)  5.41 * 10-8 
B)  1.84 * 10-6 
C)  1.84 *106 
D)  184 *106 
E)  184 *104 
A)  5.41 * 10-8 
B)  1.84 * 10-6 
C)  1.84 *106 
D)  184 *106 
E)  184 *104

Question 13

Convert 316718.0 mm to kilometers.

Accepted Answer

A)  3.167180 km 
B)  0.3167180 km 
C)  316.7180 km 
D)  3167.180 km 
E)    km 
A)  3.167180 km 
B)  0.3167180 km 
C)  316.7180 km 
D)  3167.180 km 
E)    km

Question 14

In the sum of 54.34 + 45.66, the number of significant figures is

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 15

How many significant figures are in the number 4.00700 * 1013?

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  6 
E)  none of these 
A)  2 
B)  4 
C)  5 
D)  6 
E)  none of these

Question 16

Which of the following is an SI unit for expressing the mass of a block of Au?

Accepted Answer

A)  m 
B)  g 
C)  L 
D)  pound 
A)  m 
B)  g 
C)  L 
D)  pound

Question 17

The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 10.4 mL is

Accepted Answer

A)  0.928 g 
B)  928 g 
C)  92.8 g 
D)    g 
E)  none of these 
A)  0.928 g 
B)  928 g 
C)  92.8 g 
D)    g 
E)  none of these

Question 18

Convert 9.75 kg to pounds (1 lb = 453.6 g).

Accepted Answer

A)  21.5 lb 
B)    lb 
C)    lb 
D)  4.42 lb 
E)    lb 
A)  21.5 lb 
B)    lb 
C)    lb 
D)  4.42 lb 
E)    lb

Question 19

The number 600,000 expressed in scientific notation is

Accepted Answer

A)  6.0 * 105 
B)  6.0 * 10-5 
C)  60 * 104 
D)  600 * 103 
E)  6 * 105 
A)  6.0 * 105 
B)  6.0 * 10-5 
C)  60 * 104 
D)  600 * 103 
E)  6 * 105

Question 20

How many significant figures are in the number 0.0040090?

Accepted Answer

A)  8 
B)  7 
C)  6 
D)  5 
E)  4 
A)  8 
B)  7 
C)  6 
D)  5 
E)  4

Exam 2: Measurements and Calculations

The number 243.306 rounded off to five significant figures is

An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of 74.2 mL of ethyl alcohol?

How many milliliters are in 0.070 L?

How many millimeters are in centimeters?

How many significant figures are in the number 3.400?

Convert: -97.7°C = ____________ K.

Convert: 904.4 mm = ______________ m.

Convert: 15.3°F = _______________ °C.

Convert 17.2 cm to inches (2.54 cm = 1 in).

If a 100.-g sample of platinum metal has a volume of 4.671 mL, what is the density of platinum in g/cm3?

Convert: 0.326 mm = ____________ m.

Express 1840000 in scientific notation.

Convert 316718.0 mm to kilometers.

In the sum of 54.34 + 45.66, the number of significant figures is

How many significant figures are in the number 4.00700 * 1013?

Which of the following is an SI unit for expressing the mass of a block of Au?

The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 10.4 mL is

Convert 9.75 kg to pounds (1 lb = 453.6 g).

The number 600,000 expressed in scientific notation is

How many significant figures are in the number 0.0040090?

Chemistry: an Introduction

Matter

Chemical Foundations: Elements, Atoms, and Ions

Nomenclature

Chemical Reactions: an Introduction

Reactions in Aqueous Solutions

Chemical Composition

Chemical Quantities

Energy

Modern Atomic Theory

Chemical Bonding

Gases

Liquids and Solids

Solutions

Acids and Bases

Equilibrium

Oxidation-Reduction Reactions and Electrochemistry

Radioactivity and Nuclear Energy

Organic Chemistry

Biochemistry

Filters

An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm³, what is the mass of 74.2 mL of ethyl alcohol?

If a 100.-g sample of platinum metal has a volume of 4.671 mL, what is the density of platinum in g/cm³?

How many significant figures are in the number 4.00700 * 10¹³?