Chemistry Reference
In-Depth Information
Lesson 2-6 Review
1.
m
v
2.34 g
7.3 cm
3
[0.32 g/cm
3
]—
, which rounds to 0.32 g/cm
3
D =
=
= 0.3205479452 g/cm
3
2.
[2.8 g]—m = D × v = 5.5 g/cm
3
× 0.50 cm
3
= 2.75 g, which rounds to 2.8 g
3.
[42.2 g]—m = D × v = 32.7 g/cm
3
× 1.29 cm
3
= 42.183 g, which rounds to 42.2 g
m
D
1.2 g
0.89 g/cm
3
4.
[1.3 cm
3
]—
, which rounds to 1.3 cm
3
v =
=
= 1.348314607 cm
3
m
D
56.4 g
1.12 g/cm
3
5.
[50.4 cm
3
]—
, which rounds to 50.4 cm
3
v =
=
= 50.35714286 cm
3
Chapter 2 Examination
1.
[e. mass]
2.
[b. ampere]
3.
[f. weight]
4.
[d. milli-]
5.
[a. kilogram]
6.
[g. volume]
7.
[i. Kelvin]—Although you probably use Celsius thermometers in the lab,
you need to convert the temperatures to Kelvin in many lab activities.
8.
[h. density]
9.
[c. centi-]—There are one hundred years in a century, but there are 100
centimeters in one meter.
2.34 g ×
100 cg
10. A. [234 cg]—
1 g
= 234 cg
0.0335 km ×
1000 m
1 km
100 cm
1 m
B. [33500 cm]—
×
= 33500 cm
1 m
10 dm
= 59.3 m
C. [59.3 m]—
593 dm ×
1000 cm
3
1 dm
3
D. [3450 cm
3
]—
3.45 dm
3
×
= 3450 cm
3
9.34 g
cm
3
100 cg
1 g
×
1000 cm
3
1 L
11. A. [934000 cg/L]—
×
= 934000 cg/L
0.0512 km
h
1000 m
1 km
×
100 cm
1 m
1 h
3600 s
B. [1.42 cm/s]—
×
×
= 1.42 cm/s
1.3 L
h
1000 ml
L
1 h
3600 s
C. [0.36 ml/s]—
×
×
= 0.36 ml/s
33.4 kg
dm
3
1000 g
1 kg
1 dm
3
1000 cm
3
= 33.4 g/cm
3
D. [33.4 g/cm
3
]—
×
×
12. A. [4]—The 3 and the 9 are significant because they are nonzero digits. The
two zeros are significant because they are found between two significant digits.
