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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)4.610×10−7 m=4.308912234273×10−19 J(unrounded) After rounding, the answer to equation A should have 5 significant figures. 3 significant figures. 4 significant figures. 1 significant figure. 2 significant figures. equation B: (6.022× 1023 atoms/mol)(0.469 g)20.18 g/mol=1.400×1022 atoms(unrounded) After rounding, the answer to equation B should have 1 significant figure. 2 significant figures. 3 significant figures. 4 significant figures.

To how many significant figures should each answer be rounded?   equation A: (6.626× 10−34 J⋅s)(2.9979× 108 m/s)4.610×10−7 m=4.308912234273×10−19 J(unrounded) After rounding, the answer to equation A should have 5 significant figures. 3 significant figures. 4 significant figures. 1 significant figure. 2 significant figures. equation B: (6.022× 1023 atoms/mol)(0.469 g)20.18 g/mol=1.400×1022 atoms(unrounded) After rounding, the answer to equation B should have 1 significant figure. 2 significant figures. 3 significant figures. 4 significant figures.

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter1: Matter And Measurements
Section: Chapter Questions
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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)4.610×10−7 m=4.308912234273×10−19 J(unrounded)
After rounding, the answer to equation A should have
5 significant figures.
3 significant figures.
4 significant figures.
1 significant figure.
2 significant figures.
equation B: (6.022× 1023 atoms/mol)(0.469 g)20.18 g/mol=1.400×1022 atoms(unrounded)
After rounding, the answer to equation B should have
1 significant figure.
2 significant figures.
3 significant figures.
4 significant figures.
5 significant figures.
 
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