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In Chemistry / High School | 2014-05-05

Unknown element X combines with oxygen to form the compound [tex]XO_2[/tex]. If 44.0 grams of element X combines with 8.00 grams of oxygen, what is the atomic mass of element X?

A. 16 amu
B. 44 amu
C. 88 amu
D. 176 amu
E. 352 amu

Asked by Holstine373

Answer (2)

By combining known masses of element X and oxygen we calculate the molar mass of X to be 80.00 amu, which does not match the provided answer choices, indicating a possible error in the options. ;

Answered by AdamJoyce | 2024-06-18

The atomic mass of element X is calculated to be 176.0 amu by using the total mass of the compound formed with oxygen and the mass of oxygen in that compound. Therefore, the correct answer is D. 176 amu.
;

Answered by AdamJoyce | 2024-10-30

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