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B.-77.4K c all temperatures are 0 K on the Kelvin scale E. 469.0K 8. How many milliliters is 0.005 L? A. 0.5 mL B, 5 mL C. 0.50 mL D. 0.000005 mL E. 200 ml. 9. Iron has a density of 7.86 gw The volume occupied by 55.85 g of iron is cm A. 0.141 cm B. 7.11 cm c 2.8 cm D. 439 cm3. E. None of the above 10. Express the number 0.000053 in scientific notation. A. 5.3 x 102 B. 5.3 x 103 C. 5.3 x 104 D. 5.3 x 105 E. 5.3 x 104 11. The number 1.050 x 109 has how many significant figures? A. 2 B. 3 C. 4 D, 9 E. 13 12. How many significant figures does the result of the following operation contain? 8.52010 x 7.90 A. 2 B. 3 D. 5 E. 6 the following sum contain? 13. How many significant figures does the result of 8.5201 1.93 A. 1 B. 2 C. 3 D. 4 E. 5
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Answer #1

8) B

9) B

10) D

11) C

12) B

Rules for Multiplication

* Multiply the numbers.

* Round result to the same number of sig figs as least precise value.

13) C

Rules for Addition

*Add the numbers.

*Round result to the same number of decimal places as least precise value.

So o o0SL5 Ans) B nsity tc, - j ass Volume 7 1-86 55.85 V: 55851.06 1.1l ? Ans) B Ans) D

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