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Abinary compound created by reaction of chromium and an unknown element e contains 68.47% cr and 31.53% e by mass. if the formula of the compound is cr2e3, calculate the atomic mass of e.
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If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!
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Abinary compound created by reaction of chromium and an unknown element e contains 68.47% cr and 31....
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