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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

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

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter1: Essential Ideas
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Problem 23E: When elemental iron corrodes it combines with oxygen in the air to ultimately form red brown...
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For Q7. I am confused on why the answer Is 39 instead of 39.11. Please help
Q3. How many significant figures are in the number 0.00620? (a) 2 (b) 3 100,00 (c) 4 (d) 5 Q 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 (d) 3.503 x 104 kg Chemical Principles (b) 7.68 m (d) 7.68 x 10-2 m Jour P:91 'e:gt 'q:1 'e
Transcribed Image Text:Q3. How many significant figures are in the number 0.00620? (a) 2 (b) 3 100,00 (c) 4 (d) 5 Q 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 (d) 3.503 x 104 kg Chemical Principles (b) 7.68 m (d) 7.68 x 10-2 m Jour P:91 'e:gt 'q:1 'e
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