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Q6. Perform this addition to the correct number of significant Q figures: 8.32 + 12.148 +0.02 (a) 20.488 (b) 20.49 (c) 20.5 (d) 21 07 Rorform thi nel

Q6. Perform this addition to the correct number of significant Q figures: 8.32 + 12.148 +0.02 (a) 20.488 (b) 20.49 (c) 20.5 (d) 21 07 Rorform thi nel

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter1: Basic Concepts Of Chemistry
Section: Chapter Questions
Problem 53RGQ: At 25 C, the density of water is 0.997 g/cm3, whereas the density of ice at 10 C is 0.917 g/cm3....
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For Q6. I am uncertain on how 20.49 is the answer because I thought we’d use the figure with least sig figs which is 1 sig fig in this problem. I’m confused on why it’s 4 sig figs in the answer.
eText 2.0 Q1. Express the number 0.000042 in scientific notation. (a) 0.42 x 10-4 (c) 4.2 x 10-4 (b) 4.2 x 10-5 (d) 4 x 10-5 Q2. A graduated cylinder has markings every milliliter. Which measurement is accurately reported for this grad- uated cylinder? (a) 21 mL (b) 21.2 mL (c) 21.23 mL (d) 21.232 mL Q3. How many significant figures are in the number 0.00620? (a) 2 (b) 3 000 (c) 4 (d) 5 Q4. Round the number 89.04997 to three significant figures. (a) 89.03 (b) 89.04 (c) 89.1 (d) 89.0 Q5. Perform this multiplication to the correct number of sig- nificant figures: 65.2 x 0.0015 × 12.02 (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 -4 (d) 3.503 x 104 kg The eText 2.0 Icon indicates that is embedded and interactive in the Q10. A run runne (a) 1 (c) 8 Q11. An a Wha per (a) (c) 012. Co (a 150m (c Q13. C ( Q14. (b) 7.68 m (d) 7.68 x 10-2 m Q15 Q1 P:91 'est 'q: 'e:E
Transcribed Image Text:eText 2.0 Q1. Express the number 0.000042 in scientific notation. (a) 0.42 x 10-4 (c) 4.2 x 10-4 (b) 4.2 x 10-5 (d) 4 x 10-5 Q2. A graduated cylinder has markings every milliliter. Which measurement is accurately reported for this grad- uated cylinder? (a) 21 mL (b) 21.2 mL (c) 21.23 mL (d) 21.232 mL Q3. How many significant figures are in the number 0.00620? (a) 2 (b) 3 000 (c) 4 (d) 5 Q4. Round the number 89.04997 to three significant figures. (a) 89.03 (b) 89.04 (c) 89.1 (d) 89.0 Q5. Perform this multiplication to the correct number of sig- nificant figures: 65.2 x 0.0015 × 12.02 (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 -4 (d) 3.503 x 104 kg The eText 2.0 Icon indicates that is embedded and interactive in the Q10. A run runne (a) 1 (c) 8 Q11. An a Wha per (a) (c) 012. Co (a 150m (c Q13. C ( Q14. (b) 7.68 m (d) 7.68 x 10-2 m Q15 Q1 P:91 'est 'q: 'e:E
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