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Q8. Convert 76.8 cm to m. (a) 0.0768 m (c) 0.768 m Q9. Convert 2855 mg to kg. (a) 2.855 x 10³ kg (b) 2.855 kg (c) 0.02855 kg (d) 3.503 x 104 kg Chemical Principles (b) 7.68 m (d) 7.68 x 10-2 m P:91 'e:g1 'qt

Q8. Convert 76.8 cm to m. (a) 0.0768 m (c) 0.768 m Q9. Convert 2855 mg to kg. (a) 2.855 x 10³ kg (b) 2.855 kg (c) 0.02855 kg (d) 3.503 x 104 kg Chemical Principles (b) 7.68 m (d) 7.68 x 10-2 m P:91 'e:g1 'qt

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter1: Introduction To Chemistry
Section: Chapter Questions
Problem 1.98QE
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Q9. I am unsure on how to get the final answer. I believe we have to convert the number to scientific notation but I’m not sure how they got that answer.
cm = 0.01m 76.8×0.01 = 10.768 76.8xx 0.01m I lem 2855 S kg 11x10-0x5² 179/ mg 2855 mg ng x = 285500000 2.855 10
Transcribed Image Text:cm = 0.01m 76.8×0.01 = 10.768 76.8xx 0.01m I lem 2855 S kg 11x10-0x5² 179/ mg 2855 mg ng x = 285500000 2.855 10
r (a) 1.17 (b) 1.18 (c) 1.2 (d) 1.176 Q6. Perform this addition to the correct number of significant figures: 8.32 + 12.148 +0.02 (a) 20.488 (b) 20.49 (c) 20.5 (d) 21 Q7. Perform this calculation to the correct number of significant figures: 78.222 x (12.02 - 11.52) (a) 39 (b) 39.1 (c) 39.11 (d) 39.111 Q8. Convert 76.8 cm to m. (a) 0.0768 m (c) 0.768 m Q9. Convert 2855 mg to kg. (a) 2.855 x 10-³ kg (b) 2.855 kg (c) 0.02855 kg (d) 3.503 x 104 kg p:91 'est 'q:t Chemical Principles Uncertainty Scientists report measured quantities so that the number of digits reflects the certainty in the measurement. Write mea- sured quantities so that every digit is certain except the last, which is estimated. Units Measured quantities usually have units associated with them The SI unit for length is the meter; for mass, the kilogram; anc for time, the second. Prefix multipliers such as kilo- or milli om often used in combination with these basic units. The S d to the third powe (b) 7.68 m (d) 7.68 x 10-² m
Transcribed Image Text:r (a) 1.17 (b) 1.18 (c) 1.2 (d) 1.176 Q6. Perform this addition to the correct number of significant figures: 8.32 + 12.148 +0.02 (a) 20.488 (b) 20.49 (c) 20.5 (d) 21 Q7. Perform this calculation to the correct number of significant figures: 78.222 x (12.02 - 11.52) (a) 39 (b) 39.1 (c) 39.11 (d) 39.111 Q8. Convert 76.8 cm to m. (a) 0.0768 m (c) 0.768 m Q9. Convert 2855 mg to kg. (a) 2.855 x 10-³ kg (b) 2.855 kg (c) 0.02855 kg (d) 3.503 x 104 kg p:91 'est 'q:t Chemical Principles Uncertainty Scientists report measured quantities so that the number of digits reflects the certainty in the measurement. Write mea- sured quantities so that every digit is certain except the last, which is estimated. Units Measured quantities usually have units associated with them The SI unit for length is the meter; for mass, the kilogram; anc for time, the second. Prefix multipliers such as kilo- or milli om often used in combination with these basic units. The S d to the third powe (b) 7.68 m (d) 7.68 x 10-² m
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