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The atomic weight of an unknown element,in atomic mass units (amu),is approximately 20% less than that of calcium. The atomic weight of calcium is 40 amu. What is the approximate weight,in amu,of the unknown
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The atomic weight of an unknown element,in atomic mass units (amu),is approximately 20% less than that of calcium. The atomic weight of calcium is 40 amu. What is the approximate weight,in amu,of the unknown element?

User Eduardo Tolentino
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1 Answer

3 votes
amu of unknown element = 40 - (20% * 40)
= 40 - 8
= 38 amu

therefore, the approximate weight of the unknown element is 38 amu.

hope this helps.
User Fawwaz Yusran
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8.2k points
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