# Chapter 1 In-Class Exercises ```1.3 Convert each of the following values to
scientific notation.
(a) 29,500
(b) 0.000082
(c) 650,000,000
(d) 0.0100
1.4 Convert each of the following values to
scientific notation.
(a) 0.00010
(b) 4500
(c) 90,100,000
(d) 0.0000079
1.5 Convert each of the following values from
scientific notation to decimal form.
(a) 1.86 &times; 10−5
(b) 1 &times; 107
(c) 4.53 &times; 105
(d) 6.1 &times; 10−3
1.7 For each of the following, carry out the
mathematical operation and report answers in
scientific notation.
(a) (3.1 &times; 105) &times; (2.0 &times; 10−2)
(b) (7.0 &times; 109) &divide; (2.0 &times; 102)
(c) (2.8 &times; 10−4) &divide; (9.6 &times; 10−2)
(d) (5.0 &times; 10−4)2
(e) (8.50 &times; 105) − (3.0 &times; 104)
(f) (6.4 &times; 10−3) &divide; (4.0 &times; 103)
1.9 Determine the number of significant figures
in the following.
(a) 0.0950
(b) 760
(c) 1.005
(d) 0.0052
(e) 3.46 &times; 1015
1.10 Determine the number of significant
figures in the following.
(a) 1.48 &times; 10−2
(b) 156.0
(c) 0.04350
(d) 70.25
(e) 140
1.11 Express the answers to the following
operations with the proper number of
significant figures.
(a) 1.2 &times; 1.216
(b) 3.000/2.0
(c) (1.201 &times; 103) &times; (1.2 &times; 10−2)
(d) (1.44)1/2
1.12 Express the answers to the following
operations with the proper number of
significant figures.
(a) (1.600 &times; 10−7)(2.1 &times; 103)
(b) (1.33)3
(c) 1.93 &times; 2.651
(d) 4.4/2.200
1.19 Carry out the following conversions.
significant figures.
(a) 36 mm to m
(b) 357 kg to g
(c) 76.50 mL to L
(d) 0.0084670 m to cm
(e) 597 nm to m
(f) 36.5 in to cm
(g) 168 lb to g
(h) 914 qt to L
(i) 44.5 cm to in
(j) 236.504 g to lb
(k) 2.0 L to qt
1.24 Carry out the following conversions.
significant figures.
(a) 27 ft/s to cm/min
(b) 2764 ft3 to m3
(c) 0.927 g/mL to lb/gal
1.49 Classify each of the following as an element or
a compound.
a) O2
b) Fe2O3
(c) P4
(d) He
(e) NaCl
(f) H2O
1.96
The average density of human blood is
1060 kg/m3. What is the mass of blood in a
person who has a blood volume of 0.00500
kilograms and in units of pounds.
1.150 A rectangular block of an unknown
metal with a mass of 456 g is measured to have
a length, width, and height of 10.2 cm, 5.08 cm,
and 3.26 cm, respectively. What is the likely
identity of the metal?
A. zinc, density = 7.14 g/cm3
B. lead, density = 11.3 g/cm3
C. aluminum, density = 2.70 g/cm3
D. nickel, density = 8.91 g/cm3
E. titanium, density = 4.51 g/cm3
What would be the masses of the same size
blocks of the other metals?
```