Atom and Answer Essay Example

Chapter 1: Measurements (20) 1)
The measurement 0.000 004 3 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. Answer:
B
2)
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 Answer:
C
3)
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 Answer:
C
4)
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 Answer:
E
5)
What is the correct answer for the calculation of a volume (in mL) with measured numbers [pic]? A)
0.22 mL B)
0.223 mL C)
57 mL D)
14 mL E)
14.3 mL Answer:
A
6)
When 2610 + 11.7 + 0.22 are added, the answer to the correct number of significant figures is A)
2621.92
B)
2621.9
C)
2621
D)
2620
E)
2600
Answer:
D
7)
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 Answer:
D
8)
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.