1.A car is traveling on Interstate 90 at 65 miles per hour. If it is approximate

Question

1.A car is traveling on Interstate 90 at 65 miles per hour. If it is approximately 6.76 x 102 km from Cleveland, Ohio to Chicago, Illinois, how many hours will the trip take assuming no stops? (1 mi = 5280 ft, 1 m = 3.28 ft)

A. 4.2 hr

B. 10. hr

C. 16 hr

D. 17 hr

E.   6.5 hr

2. In a laboratory experiment, the temperature of a salt and ice bath registers 23.0oF. What is this temperature in Kelvins?

A. 278 K

B. 346 K

C. 268 K

D. 73.4 K

E. –5.0 K

3. One liter is approximately equal to:

     A. 1 gal         

B. 1ft3           

C. 1 pt                       

D. 1 qt

     E. 100 mL

4. Which quantity is larger than 1 km?

A. 0.700 miles           

B. 300 in       

C. 500 in       

D. 2.54x104 cm

E. 1000 ft

5. Which of the following measured numbers has three significant figures?

A. 1.0 × 103 cm

B. 10.01 cm

C. 1.01 cm

D. 0.001 cm

E. 100 cm

6.Which of the following numbers contains the designated correct number of sig. figs.?

A. 0.04300 (5 significant figures)

B. 0.00302 (2 significant figures)

C. 1.04 (2 significant figures)

D. 3.0650 (4 significant figures)

E. 156000 (3 significant figures)

7. The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is ________.

A. 13.071 g

B. 13.0 g

C. 10 g

D. 13 g

E. 13.1 g

8. What is the conversion factor for the relationship between millimeters and centimeters?

A. 10 mm/1 cm

B. 1 mm/ 1 cm

C. 1 cm/1 mm

D. 10 cm/1 mm

E. 100 mm/1 cm

9.How many liters of soft drink are there in 5.25 qt?

            A. 5.0 L

            B. 4950 L

            C. 55.7 L

            D. 5.57 L

            E. 4.97 L

10. A 250.0 g sample of eighteen karat gold is contains 187.5 g of gold and 62.5 g of other metals. What is the percent of gold in the sample?

            A. 25.0%

B. 75.0%

C. 12.0%

D. 100.0%

E. 50.0%

11.If a car travels 23 miles on 1.0 gal of gas, how many liters of gasoline are needed for a 135 mile trip?

            A. 5.9 L

            B. 22 L

            C. 32 L

            D. 25 L

            E. 14 L

12. If 5.00 lb of potatoes costs $3.60, how much would 1.30 kilograms of potatoes cost?

      A. $3.97

      B. $10.30

      C. $2.06

      D. $0.43

      E. $0.86

Explanation / Answer

1 km = 0.6214mile

So 6.76 x 102 km = 428.47 miles

Now 65 miles in 60 min, so how much time for 428.47 miles

= 428.47 x 60/65

=395.5/65 = 395.51 min = 6.54 hrs = 6.5 hrs

2. B

3.. Answer is D , 1 qt

4.. Answer is A 0.700 miles

5.. Answer is C, 1.01 has 3 significant digits.

6.. E. 156000 (3 significant figures)

7.. A. 13.071 g

8.. A. 10 mm/1 cm

9.. E. 4.97 L

10.. B. 75.0%

11.. B. 22 L

12.. C. $2.06

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