# Measurements and Calculations

```Measurements and Calculations

( ) nm= 10-3 m
( ) A number that is greater than 1 will always have a positive exponent
when written in scientific notation.
( ) Specific gravity has no units.
( ) Exact numbers can be assumed to have an unlimited number of
significant figures.
(1)
(2)
(3)
(4)
1
2
3
4
5
○
&times;
○
○
6
7
8
9
10
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12
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16

(1)
( )
10-3
(A) c (B) d (C) k (D) m
(2)
( )
109
(A) G (B) M (C) P (D) T
12
(3)
( )
10
(A) G (B) M (C) P (D) T
(4)
( )
1 nm =
(A) 10-3 (B) 10-6 (C) 10-9 (D) 10-12 m
(5)
( )
Which is correct? (A) 100 oF = 32 oC (B) -40 oF = -40 oC (C) 77 K =
-186 oC (D) 70 oC = 333 K
(6)
( )
(7)
( )
There are 5280 feet in 1 mile.
Indicate the number of significant figures implied in the above
statements. (A) 1 (B) 2 (C) 3 (D) infinite
(9.7871)( 2)
(0.00182)( 43.21)
How many significant digits should the answer to the calculation be
expressed? (A) 1 (B) 3 (C) 4 (D) 5
(8)
( )
1.492&times;102 + 3.40&times;10-2 + 2.00034&times;103
How many significant digits should the answer have? (A) 3 (B) 4 (C)
5 (D) 6
(9)
( )
(10)
( )
(67.41 + 0.32 + 1.98)/(18.225)
How many significant digits should the answer have? (A) 3 (B) 4 (C)
5 (D) 6
Iron has a density of 7.87 g/cm3. If 52.4 g of iron is added to 75.0 mL
of water in a graduated cylinder, to what volume reading will the
water level rise? (A) 78.4 (B) 79.5 (C) 80.6 (D) 81.7
1
2
3
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D
A
D
C
B
D
A
C
B
D

(1)
(2)
Give the answer for each calculation to the correct number of significant
figures.
a. 12.6 x 0.53
b. (12.6 x 0.53) – 4.59
Perform the indicated temperature conversions.
a. 275 K to oC
b. 82 oF to oC
(1)
a. 6.7
b. 2.1
(2)
a. 2 oC
b. 28 oC
```