To how many significant figures should each answer be rounded? equation A: (6.626× 10−34 J⋅s)(2.9979× 108 m/s)4.650×10−7 m=4.271846322581×10−19 J(unrounded) After rounding, the answer to equation A should have 1 significant figure. 2 significant figures. 3 significant figures. 5 significant figures. 4 significant figures. equation B: (6.022× 1023 atoms/mol)(0.787 g)20.18 g/mol=2.349×1022 atoms(unrounded) After rounding, the answer to equation B should have 2 significant figures. 3 significant figures. 5 significant figures. 4 significant figures. 1 significant figure.
To how many significant figures should each answer be rounded? equation A: (6.626× 10−34 J⋅s)(2.9979× 108 m/s)4.650×10−7 m=4.271846322581×10−19 J(unrounded) After rounding, the answer to equation A should have 1 significant figure. 2 significant figures. 3 significant figures. 5 significant figures. 4 significant figures. equation B: (6.022× 1023 atoms/mol)(0.787 g)20.18 g/mol=2.349×1022 atoms(unrounded) After rounding, the answer to equation B should have 2 significant figures. 3 significant figures. 5 significant figures. 4 significant figures. 1 significant figure.
Introductory Chemistry: A Foundation
8th Edition
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter2: Measurements And Calculations
Section: Chapter Questions
Problem 100AP
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To how many significant figures should each answer be rounded?
equation A: (6.626× 10−34 J⋅s)(2.9979× 108 m/s)4.650×10−7 m=4.271846322581×10−19 J(unrounded)
After rounding, the answer to equation A should have
1 significant figure.
2 significant figures.
3 significant figures.
5 significant figures.
4 significant figures.
equation B: (6.022× 1023 atoms/mol)(0.787 g)20.18 g/mol=2.349×1022 atoms(unrounded)
After rounding, the answer to equation B should have
2 significant figures.
3 significant figures.
5 significant figures.
4 significant figures.
1 significant figure.
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