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AP Chemistry/Unit 1: Atomic Structure and Properties
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Elemental Composition By Mass

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Calculate the percent composition by mass of oxygen in calcium nitrate, Ca(NO3)2Ca(NO_3)_2, using the atomic masses provided in the table.

Element Atomic Mass (g/mol)
Ca 40.08
N 14.01
O 16.00
A

34.9%

B

42.0%

C

67.8%

D

58.5%

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