To how many significant figures should each answer be rounded? (6.626x 10-34 J . s) (2.9979x 10% m/s) equation A: = 4.483992189616 x 10-19 J(unrounded) 4.430 x 10-7 m After rounding, the answer to equation A should have O 1 significant figure. O 4 significant figures. O 2 significant figures. O 3 significant figures. O 5 significant figures. (6.022x 1023 atoms/mol) (0.653 g) 20.18 g/mol = 1.949 x 1022 atoms (unrounded) equation B: After rounding, the answer to equation B should have
To how many significant figures should each answer be rounded? (6.626x 10-34 J . s) (2.9979x 10% m/s) equation A: = 4.483992189616 x 10-19 J(unrounded) 4.430 x 10-7 m After rounding, the answer to equation A should have O 1 significant figure. O 4 significant figures. O 2 significant figures. O 3 significant figures. O 5 significant figures. (6.022x 1023 atoms/mol) (0.653 g) 20.18 g/mol = 1.949 x 1022 atoms (unrounded) equation B: After rounding, the answer to equation B should have
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter2: Measurements And Calculations
Section: Chapter Questions
Problem 31QAP: For the pin shown in Fig. 2.5, why is the third figure determined for the length of the pin...
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Transcribed Image Text:To how many significant figures should each answer be rounded?
(6.626x 10-34 J . s) (2.9979x 10% m/s)
equation A:
= 4.483992189616 x 10-19 J (unrounded)
4.430 x 10-7 m
After rounding, the answer to equation A should have
O 1 significant figure.
O 4 significant figures.
O 2 significant figures.
O 3 significant figures.
O 5 significant figures.
(6.022x 1023 atoms/mol) (0.653 g)
20.18 g/mol
= 1.949 x 1022 atoms (unrounded)
equation B:
After rounding, the answer to equation B should have
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